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[Storage] Version 1.2. Course Outline  Introduction to Network Storage  RAID Technologies  Storage Essentials Basic Terminologies and Concepts Hard.

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Presentation on theme: "[Storage] Version 1.2. Course Outline  Introduction to Network Storage  RAID Technologies  Storage Essentials Basic Terminologies and Concepts Hard."— Presentation transcript:

1 [Storage] Version 1.2

2 Course Outline  Introduction to Network Storage  RAID Technologies  Storage Essentials Basic Terminologies and Concepts Hard Drive Interface Technologies  SAN Technologies Fiber Channel Technology iSCSI Technology  D-Link SAN (Storage Area Network) D-Link Products for Storage Area Network Market Analysis for D-Link SAM Products D-Link SAN Implementation  SAN Product Features Overview Volume Management Device Management iSCSI Features Volume and RAID Support  D-Link NAS (Network Attached Storage) D-Link Products for Network Attached Storage Market Analysis for D-Link NAS Products  NAS Product Features Overview Managing the Device User and Group Management Appliance Servers Network Features USB Port Applications  Applications and Solutions for Network Storage NAS Applications SAN Applications 2

3 DCS – Storage Introduction to Network Storage 3

4 Introduction to Network Storage After this section, you should gain more knowledge of the following: 1.Types of current storage solutions for computerized devices 2.Characteristics of DAS and the challenges of using it 3.Characteristics of NAS and the benefits/advantages that it offers 4.Characteristics of SAN and the benefits/advantages that it offers 5.Differences among each storage solution 4

5 Evolutions of Storage Technology  1940s – Data was mostly stored on punched card and punched paper tape.  1951 – First computer to use magnetic tape for storage.  1956 – IBM introduced the first commercial hard disk drive known as RAMAC (Random Access Method of Accounting and Control).  1962 – The laser diode was invented by IBM which became the fundamental technology for read-write optical storage devices.  1963 – IBM introduced the first storage unit with removable disks. This became an end for punched-cards era.  1970 – Portable storage was born with the invention of the floppy disk.  1978 – The first patent for RAID technology was filed.  1981 – The Intelligent interface for disk drive “SASI” was developed by Shugart Associates and NCR Corporation. This interface is the predecessor to SCSI interface.  1982 – SCSI interface was born and developed based on its predecessor, SASI.  1984 – Compaq and Western Digital Co. produced ST506 controller that was able to be mounted on the hard disk drive and connected to the PC using a 40-pin cable.  Storage Evolutions Introduction to Network Storage Page is Animated

6 Evolutions of Storage Technology (cont’d)  1985 – First IDE drive was built by integrating ST506 controller in the hard disk drive.  1986 – SCI specification was defined in a ANSI standard X  1994 – SCSI-2 became an ANSI standard X and the IDE standard was approved by the ANSI under the name ANSI X  1996 – The ATA-2 interface that complied with the ANSI X standard was the AT Attachment Interface with Extensions, and the ATA-2 interface that complied with the ANSI X standard was the AT Attachment Interface with Extensions.  1998 – The ATA/ATAPI-4 interface that complied with the ANSO NCITS was the AT Attachment Interface with Packet Interface Extension.  2000 – The ATA/ATAPI-5 interface that complied with the ANSI NCITS was the AT Attachment Interface with Packet Interface-5.  2000 – The Serial ATA 1.0 Working Group was established to specify Serial ATA for desktop applications.  2001 – Serial ATA 1.0 was released in August of 2001 (with subsequent revisions 1.0a and 1.1) which provided significant improvement over parallel ATA.  2003 – Hitachi bought IBM Data Storage Division.  Storage Evolutions Introduction to Network Storage Page is Animated

7 Types of Storage Solution  Internal Storage Memory (DDR) IDE ATA Hard Disk / Optical Compact Disk SCSI Hard Disk SATA Hard Disk  External Storage Direct Attached Storage (DAS) Network Storage – Network Attached Storage (NAS) – Storage Area Network (SAN) USB Storage Enclosure Firewire 1394 Storage Enclosure Slim Disk Memory  Storage Solutions Introduction to Network Storage 7

8 Direct Attached Storage (DAS)  Storage Solutions Introduction to Network Storage  A storage system directly attached to a client (commonly to a computer or server), without a storage network in between.  Common example of DAS would be a storage enclosure externally attached to a server, where clients in the network must access the server in order to connect to the storage device. 8 Client Local Area Network Oracle Database Server File Server Active Directory Server Host Bus Adapter DAS #1 DAS #2 DAS #3 DAS #4 Network Application Server

9 Challenges of DAS  Difficulty managing servers and storage with slow backup causing heavy LAN congestion  Limited number of drives supported  Limitation on storage size  Inability to share storage across multiple servers  Time-consuming and complex backup and management  Need for storage down time (off-line) when installing additional drives  Storage Solutions Introduction to Network Storage 9

10 Solution for DAS  Storage Solutions Introduction to Network Storage  Simplify storage management by separating the data from application server. 10 DAS  Network Storage

11 Why Do We Need Network Storage?  Volume of data keeps growing exponentially  Redundancy and backup necessity  Data availability and accessibility  Storage consolidation for centralized management*  Increase reliability and better performance (speed)  Storage virtualization*  Overall cost reduction  Data Protection * Unique characteristics possessed by SAN only.  Storage Solutions Introduction to Network Storage 11

12 Network Attached Storage (NAS) Overview  Storage Solutions Introduction to Network Storage  NAS is a file-level computer data storage device connected to a computer network providing data access to heterogeneous network clients.  A NAS unit is essentially a self-contained computer connected to a network, with the sole purpose of supplying file-based data storage services to other devices on the network.  NAS are usually accessed by workstations and servers through a network protocol such as TCP/IP and applications such as Network File System (NFS) or Common Internet File System (CIFS) / Server Message Block (SMB) for file access. 12 Client Application Server File Server Public Local Area Network NAS

13 Storage Area Network (SAN) Overview  Storage Solutions Introduction to Network Storage  A high performance storage network that transfers block-level data between servers and storage devices, separate from the local area network (LAN) traffic.  In a SAN environment, storage devices, such as DAS, RAID arrays, or tape libraries are connected to servers using fiber channel or iSCSI.  Characteristics of SAN: Virtualization Storage Consolidation Scalable Block data transfer uses encapsulated SCSI 13 Application Server File Server SAN High performance private storage network Client Public Local Area Network

14 Differences of NAS and SAN Network Attached Storage (NAS)Storage Area Network (SAN) Clients sees the NAS box as an independent device (as a file server), thus the architecture is client-server based where client requests are sent directly to the NAS. Client sees the SAN as a part of a server (the SAN is connected behind the server in its own network), thus client should send the request to server connected to the SAN. Clients connect to a NAS and share files through the use of NFS, CIFS/SMB, or HTTP protocol. Clients connected to the SAN through the use of iSCSI or Fiber Channel, depending on which is supported by the SAN. File-based data transfer (data is identified by file name and other parameters, such as the file meta-data (file’s owner, permissions, etc) Block-level data transfer along long distances (data is addressed by disk block number and without file system formatting). Backups and mirrors are done on files, not blocks, which provides savings in bandwidth and time. Backups and mirrors require a block by block copy, even if blocks are empty. A mirror machine must be equal to or greater in capacity than the source volume.  Storage Solutions Introduction to Network Storage 14

15 Comparison for each of the Storage Solutions  Storage Solutions Introduction to Network Storage DAS EnclosureNAS EnclosureSAN Enclosure Directly connected to a clientConnected to servers and workstations via a pubic network Connected to servers over the private storage network Slower data access compared to network storage Fast data access (depends on the LAN speed) Fastest data access (depends on which protocol is used) Direct data transferFile level data transferBlock level data transfer Data transfer using SCSI protocol Data transfer using NFS / CIFS / SMB protocol Fiber Channel or iSCSI is used for data transfer protocol 15 Application Server File Server SAN Appliance High performance private storage network Client Public LAN

16 Summary: Introduction to Network Storage  Clients can choose from three types of storage systems to keep their data on: Direct Attached Storage (DAS), Network Attached Storage (NAS), and Storage Area Network (SAN).  Direct Attached Storage (DAS) is the most commonly used data storage solution for end user level client devices (computers, servers). It attaches the storage enclosure directly to the client device.  Network Attached Storage (NAS) is mainly targeted for home and SMB users, and offers the benefits of network storage with ease of sharing files and centralized data storage over the IP network.  Storage Area Network (SAN) is mainly targeted for Server Farms or Special Applications, e.g. IP Surveillance, and offers high performance network storage solutions for data transfers over enterprise network, with benefits include virtualization, storage consolidation, etc.  D-Link supports data transfer over the iSCSI protocol for SAN devices.  Summary Introduction to Network Storage 16

17 Questions and Answers: Introduction to Network Storage 1.What is the characteristic of Direct Attached Storage? A.Storage is connected to the server without being separated with TCP/IP network B.Storage consolidation capability C.Data transfer using Network File System (NFS) protocol D.Link multiple storage repositories to multiple clients and servers 2.What is the characteristic of D-Link Network Attached Storage? A.Provide slow data access B.Block data transfer along long distance is possible C.Data transfer using CIFS/SMB protocol D.Support server virtualization 3.What are the characteristics of D-Link Storage Area Network? (Choose Two) A.File-level data transfer along long distance B.Storage is connected directly to the server using iSCSI protocol C.Block data transfer D.Support storage virtualization and consolidation  Questions and Answers Introduction to Network Storage 17

18 DCS – Storage RAID Technologies 18

19 RAID Technologies After this section, you should gain more knowledge of the following: 1.RAID mechanisms overview 2.RAID types supported by D-Link network storage appliances 3.Characteristics of each RAID type supported by D-Link as well as the advantages and disadvantages for each (RAID 0, RAID 1, RAID 5, RAID 10, and JBOD) 19

20 RAID Technology Overview  Redundant Arrays of Independent Disks (RAID) is a data storage mechanism for dividing and/or replicating data over multiple hard drives, thus which may provide better performance, reliability, and/or larger data volume sizes. Depending on the type of RAID applied, different benefits can be achieved.  D-Link network storage supports several RAID technologies as described below: RAID LevelTypeDefinitionRedundantStriped RAID 0StripedDistributes each block of data among several drives to improve the speed of access NoYes RAID 1MirroredTwo copies of all data are written to independent disks YesNo RAID 10Mirrored Striped Stripes the data among several drives and then mirrors the data to another set of disks Yes RAID 5ParityDistributes one copy of the data among several drives and adds parity blocks spread throughout the volume to protect against the loss of any single drive Yes N/AJBODAll the disks are grouped together to form one large volume. The data is written to the disks in sequential order No  Introduction to RAID RAID Technologies 20

21 RAID 0 Technology Overview  Characteristics of RAID 0 RAID 0 works by striping the data (Data-striping) across the hard drives At least two hard drives must be provided Improved performance (high speed data transfer) No fault-tolerance No error-checking  Advantages and disadvantages AdvantagesDisadvantages Speed enhancement and improve I/O performance Maximum utilization of storage capacity* Very simple design and easy to implement No data redundancy or fault-tolerance Failure occurring in any disk of an array will result in all data in that array being lost * Each physical disk must be of the same capacity to achieve 100% storage capacity utilization  RAID 0 RAID Technologies 21

22 Illustration of RAID 0  RAID 0 RAID Technologies 22 5 Disk-0Disk-1 Data Network Storage Disk 0 Disk 1 ✕ If RAID 0 is in use and one of the disks in the array crashes, the rest of disks in the array will also not work. This will result is total data loss. Primary Disk ✕ Page is Animated

23 RAID 1 Technology Overview  Characteristics of RAID 1  RAID 1 works by mirroring the data  At least two hard drives must be provided  Fault-tolerance  Advantages and disadvantages AdvantagesDisadvantages 100% data redundancy Highest disk overhead of all RAID types Inefficient because only 50% of the physical drive storage’s capacity is used  RAID 1 RAID Technologies 23

24 Illustration of RAID 1  RAID 1 RAID Technologies Disk Disk-1 100% Redundancy!!! Network Storage ✕ If RAID 1 is in use and the primary disk crashes, the mirrored disk will automatically replace the primary disk. Primary Disk Mirrored Disk Page is Animated

25 RAID 5 Technology Overview  Characteristics of RAID 5 technology: Striped set with distributed parity Minimum three disks must be provided to implement RAID 5 Offers data protection and increases throughput  Advantages and Disadvantages AdvantagesDisadvantages 100% data protection Offer more physical drive storage capacity than RAID 1 Highest read data transaction rate Distributing the parity over all of the disks rather than putting all the parity on one disk Extra time needed to calculate the parity Disk failure has a medium impact on throughput Difficult to rebuild volume in the event of a disk failure (as compared to RAID level 1)  RAID 5 RAID Technologies 25

26 Illustration of RAID 5  RAID 5 RAID Technologies 26 Disk-0Disk-1 Disk-2 P: parity Using RAID 5, if one of the disks in the array fails, data in the failed disk can be recovered Disk-2 fails, data cannot be accessed!!! Data is fully recovered!!! Data to be written: New Disk to replace the failed disk 1 1 P=1 (1 XOR 0) P=0 (1 XOR 1) 1 P=1 (0 XOR 1) 0 P=1 (1 XOR 0) XOR 0 = 1 1 XOR 1 = 0 1 XOR 0 = 1 1 XOR 1 = 0 ✕ Data can be rebuilt to the new disk using XOR calculations by recalculating the two bits retrieved from the existing drives Rebuilt process started! Page is Animated

27 RAID 10 Technology Overview  Characteristics of RAID 10 technology:  RAID 10 provides mirroring and striping at the same time  Minimum four disks or even number of disks is required  Provides fault-tolerance and improves performance  Advantages and Disadvantages AdvantagesDisadvantages Provide fault tolerance to prevent data loss Provide high performance for I/O operation (read and write) Expensive, many disks are required to implement this RAID technology Only 50% of the physical drive storage’s capacity is used, if implements mirroring mechanism  RAID 10 RAID Technologies 27

28 Illustration of RAID 10  RAID 10 RAID Technologies 28 RAID 0 - Stripe 5 Disk Very high reliability combined with high performance!!! RAID 1 - Mirror 5 Disk Disk RAID 1 - Mirror 6 Disk-3 4 2

29 JBOD Technology Overview  Characteristics of JBOD (Just a Bunch Of Disks):  No Data redundancy, which means no fault-tolerance  Bigger array capacity  Two or more hard disks are required to create one logical drive  Advantages and Disadvantages AdvantagesDisadvantages Provide 100% storage capacity utilization No data redundancy or fault- tolerance provided  JBOD RAID Technologies 29

30 Illustration of JBOD  JBOD RAID Technologies  JBOD is usually known as concatenation where the total storage capacity equals to the sum of each separate disk Disk-1 65 Disk ……. … Total storage capacity (Σ) = capacity of Disk-0 + capacity of Disk-1 Logically seen as one big storage

31 Summary for Each RAID Technology RAID Level Data Redundancy Read Performance Write Performance Min. Number of Drives RAID-0NoSuperior 2 RAID-1YesVery HighHigh2 RAID-5YesSuperiorGood3 RAID-10YesVery HighHigh4 JBODNoSuperior 2  D-Link Storage Area Network allows migration between RAID levels, but this is dependent on number of HDD drives available.  The performance of each RAID level may vary depending on the hardware platform used.  Summary for Each RAID Type RAID Technologies 31

32 Summary: RAID Technologies  Redundant Array of Independent Disks (RAID) is a data storage mechanism that provides better performance and/or data reliability.  D-Link network storage appliances support RAID 0, RAID 1, RAID 10, RAID 5, RAID 6 and JBOD to offer greater performance and reliability for D-Link users. Which types of RAID supported is dependent on the models.  RAID 0 provides the best performance with the fastest data transfer speed by striping all the data to multiple disks.  RAID 1 provides data redundancy by mirroring/duplicating the data from one disk to another disk.  RAID 5 offers data protection and increases throughput by creating data parity and distributing it to all the provided disks.  RAID 6 offers data protection and increases throughput by creating data parity and distributing it to all the provided disks. Same as RAID 5, but with 2 parity disks.  RAID 10 combines both RAID 0 and RAID 1 at once, thus providing greater performance while also serving data redundancy to prevent single point of failure.  Just a Bunch of Disks (JBOD) is not a type of RAID mechanism and does not provide data redundancy. It is used for achieving greater storage capacity among all the hard disks, which may come in different sized capacity.  Summary RAID Technologies 32

33 Questions and Answers: RAID Technologies 1.Which RAID level does not support fault-tolerance for the stored data? A.RAID 0 B.RAID 1 C.RAID 10 D.RAID 5 E.JBOD 2.Which RAID technology supports the consolidation of all disks with different sizes thus enlarging the capacity of available storage spaces? A.RAID 0 B.RAID 5 C.JBOD D.RAID 10  Questions and Answers RAID Technologies 33

34 DCS – Storage Storage Essentials 34

35 Storage Essentials After this section, you should gain more knowledge of the following: 1.Basic terminologies commonly used to explain storage technology 2.Different hard drive technologies and the characteristics of each 35

36 Basic Terminologies  Block – A sequence of bytes or bits in which data is stored and retrieved on disk and tape devices.  Array – A set of physical disks grouped into one or more logical drives.  Logical drive - A set of actual physical disks that are grouped together and behave as if it were a single drive as seen by the user.  Volume – A set of blocks of storage that are organized and presented for use by the server.  Logical Unit Number (LUN) – number assigned to a logical unit. It can be used to refer to an entire physical disk, or a subset of a larger physical disk or disk volume. The physical disk or disk volume could be an entire single disk drive, a partition (subset) of a single disk drive, or disk volume from a RAID controller comprising multiple disk drives aggregated together for larger capacity and redundancy. LUNs represent a logical abstraction between the physical disk device/volume and the applications. For example if you partition a disk drive into smaller pieces for your application or system needs (perhaps your server's operating system has a disk drive size limit) the sub-segments would share a common SCSI target ID address with each partition being a unique LUN. In an iSCSI environment, LUNs are essentially numbered disk drives. An initiator negotiates with a target to establish connectivity to a LUN; the result is an iSCSI session that emulates a SCSI hard disk. Initiators treat iSCSI LUNs the same way as if they were a raw SCSI or IDE hard drive. For instance, rather than mounting remote directories as will be done in NFS or CIFS environments, iSCSI systems format and directly manage file systems on iSCSI LUNs. In enterprise deployments, LUNs usually represent slices of large RAID disk arrays, often allocated one per client. iSCSI imposes no rules or restrictions on multiple computers sharing individual LUNs; shared access to a single underlying file system is instead left as a task for the operating system.  Basic Terminologies and Concepts Storage Essentials 36

37 Spare Count  Basic Terminologies and Concepts Storage Essentials  Definition of Spare Spare is an drive (drive B) which is reserved for the purpose of substituting for another drive (drive A) in case of a failure on drive A.  Definition of Hot Spare Hot spare is a drive which has been flagged for use if another drive in the array fails  Definition of Spare Count Spare count is the number of drives to be kept available in case a drive which contains a volume (with data) fails. 37 Hot Spare Drive Spare Count = 1 Active Drives When one of the active drives fails, the hot spare drive will replace the failed drive Page is Animated

38 Hard Drive Interface Technologies Overview  Hard Drive Interface Technologies Storage Essentials  ATA (Advanced Technology Attachment) Mostly used in desktops and notebooks Consist of two standards: – PATA (Parallel ATA) – SATA (Serial ATA)  SCSI  Serial Attached SCSI (SAS)  Fiber Channel* 38 * Fiber channel is now commonly used for SAN solutions, but seldom used for end user computers. Though there are Fiber Channel hard drives available in the market, they are hardly found these days.

39 Why SATA?  Hard Drive Interface Technologies Storage Essentials 39 End-User Needs  More storage in limited space  Improved price/ performance  Investment protection  Lower overall system cost Serial ATA Value Proposition  Narrower Cabling  Supports lower power requirements  Lower pin counts  Higher performance (data rates up to 300MBps)  Improved connectivity (no master/ slave)  Longer cabling (reach up to one meter) System Vendor Needs  Dense boxes  Similar components  Lower power consumption  Increased air flow  More motherboard space Serial ATA offers more features and better performance than parallel ATA Page is Animated

40 Evolution of SATA  Hard Drive Interface Technologies Storage Essentials  The Serial ATA (SATA) working group will deliver incremental specification releases over the next several years. These enhancements will enable the technology to support a variety of possible storage configurations. 40 Serial ATA 1.0 Primary inside-the- box storage connection to replace parallel ATA Serial ATA II, Phase 1 Improved use of SATA 1.0 technology in server and network storage Backplane interconnect solution for racks of hot-swap drives Complete enclosure management solution (Fan control, drive lights, temperature control, new device notifications, etc) Performance improvement to address industry needs (firmware/ software, performance enhancements, including native queuing) Serial ATA II, Phase 2 Second-generation speed grade for desktops and network storage systems (Targeted 300 MB/sec) Improvements to address additional needs in higher-end network storage segments Topology support for dual host active failover Efficient connectivity to larger number of devices Page is Animated

41 SCSI Technology Overview  Hard Drive Interface Technologies Storage Essentials  SCSI (Small Computer System Interface) is a set of standards for physically connecting and transferring data between computers/ servers and peripheral devices.  SCSI is commonly used for hard disks and tape drives, but can also be connected to a wide range of other devices, including scanners and CD drives. 41

42 Summary: Storage Essentials  Hot spares are standby hard disk drives which are used as a backup to automatically replace a disk when a failure occurs. Spare count is the number of the hard disk drives provided as backup disks.  Currently, there are many hard drive technologies being provided in the market which evolves from time to time. The most well known technologies are SATA, SCSI, Serial Attached SCSI (SAS), and Fiber Channel.  SATA is the most commonly used technology today, especially at the end user level, e.g. computer device.  SCSI was commonly used for hard disks and tape drives, but can also be connected to a wide range of other devices, including scanners and CD drives. Currently, SCSI is widely used on servers and not on the end user client devices.  Summary Storage Essentials 42

43 Questions and Answers: Storage Essentials 1.What is the benefit of providing a spare disk? A.To enlarge the storage capacity when all disks have been used to store data. B.Ensure reliability by designating the spare disk as a standby/backup disk which will be used in case of disk failure. C.To serve as additional disk for use when scheduled downloading is configured. D.To serve as part of a RAID when configured, for example, to save mirrored data for RAID 1. 2.Select the hard drive type(s) which offer the key advantages of full bandwidth to each connected device, hot plug capability, smaller connector, standardized connector placement and layout, simpler cabling, and longer cable length. (Choose all that apply) A.SCSI B.SATA C.iSCSI D.PATA 3.What are the benefits of using SATA hard disks when compared to IDE hard disks? (Choose all that apply) A.Master/Slave selection B.Smaller cable connector C.Speed D.Hot-pluggable  Questions and Answers Storage Essentials 43

44 DCS – Storage SAN Technologies 44

45 SAN Technologies After this section, you should gain more knowledge of the following: 1.Technologies built for Storage Area Network 2.Details about FC SAN technologies and the required components to implement it on the network 3.Details about iSCSI technologies as well as its advantages and the required components to implement iSCSI on SAN 45

46 SAN Technologies Overview  Technologies lies behind the SAN SAN Technologies  Technologies created for building a SAN are primarily based on either Fiber Channel or iSCSI technology.  The next few pages explain each of these technologies in greater detail. 46 iSCSI TargetiSCSI Initiator D-Link SAN TCP/IP Protocol Private Local Network SAN Copper / Optical cabling for iSCSI connection Ethernet Switch D-Link SAN iSCSI Technology

47 Fiber Channel Technology Overview  Fiber Channel (FC) is a channel/network standard defined by the Technical Committee T11, which is the committee within INCITS (InterNational Committee for Information Technology Standards) responsible for Fiber Channel Interfaces  FC network contains network features that provide the required connectivity, distance, and protocol multiplexing.  Advantages of Fiber Channel*: Solutions leadership Reliable Fast data transfer providing gigabit bandwidth up to 4Gbps Multiple topologies Scalable Congestion free High Efficiency Full suite of services * The information is taken from Fiber Channel Industry Association (http://www/fibrechannel.org)  Fiber Channel Technology SAN Technologies 47

48 Basic Components of Fiber Channel SAN  Fiber Channel Technology SAN Technologies  Storage devices supporting Fiber Channel  Fiber Channel Switch (SAN fabric)  Fiber Channel Host Bus Adapter (HBA)  Cabling 48 Private Fiber Channel SAN Public Local Area Network FC Host Bus Adapter FC Storage Media Optical cabling for fiber channel connection Fiber Channel Switch

49 iSCSI Technology Overview  Definition of iSCSI (Internet SCSI) SCSI protocol which enables access to networked storage devices over a TCP/IP network (Ethernet network, WAN, Wireless network, etc)  Why iSCSI? – iSCSI Features Error Handling – Error checking using CRC (Cyclic Redundancy Check) methodology – When iSCSI detects errors it will bring down the session (all TCP connections within the session) and restart it Boot Discovery  Advantages of iSCSI Connectivity over long distances Lower costs Easier implementation and management Built-in security  Hard Drive Interface Technologies SAN Technologies 49

50 Advantages of iSCSI over FC SAN  Hard Drive Interface Technologies SAN Technologies  iSCSI is a better alternative to Fiber Channel SAN for the following reasons: Built on stable and familiar standards providing easier implementation and management Ethernet transmissions can travel over the global IP network and therefore have no practical distance limitation Scalable Creates a SAN with lower cost Interoperability issue Security issue 50 Source : IDC 2006 Sept./Dec. According to IDC, iSCSI market grows with an explosive record of about 108.4% every year. According to IDC, by 2010, iSCSI products will share more than 21% of the storage market.

51 iSCSI SAN Overview  Drive Interface Technologies SAN Technologies  iSCSI SAN components consist of: iSCSI Client/ Host (iSCSI initiator) – A client device, for example, a server (or PC), which attaches to an IP network – iSCSI Client initiates requests and receives responses from an iSCSI target iSCSI Target – A device that receives and processed the iSCSI commands, for example, a storage device 51 iSCSI Target iSCSI Initiator Server D-Link SAN TCP/IP Protocol

52 Summary: SAN Technologies  iSCSI is a network protocol which enables access to storage devices and network storage over TCP/IP networks.  D-Link adopts the iSCSI protocol to be used in its D-Link SAN.  iSCSI offers several benefits in comparison to Fiber Channel. These include interoperability, scalability, security, cost, and distance limitation.  To implement iSCSI on the SAN, all the components must be provided: iSCSI initiator, iSCSI target, and Ethernet switch.  Summary SAN Technologies 52

53 Questions and Answers: SAN Technologies 1.What are the components needed when deploying Fiber Channel SAN? (Choose all that apply) A.SCSI Storage B.Switch C.Fiber Channel Switch D.FC Host Bus Adapter 2.What component s not needed when deploying iSCSI? A.Server B.iSCSI target C.Switch D.Fiber Channel Switch  Questions and Answers SAN Technologies 53

54 DCS – Storage D-Link SAN (Storage Area Network) 54

55 D-Link SAN (Storage Area Network) D-Link SAN After this section, you should gain more knowledge of the following: 1.Various D-Link SAN appliances and differences between each 2.Each part of the hardware in the SAN 3.Key selling points of D-Link SAN appliances 4.Product positioning of D-Link SANs 5.D-Link SAN product interoperability, caching behavior, and common implementation architectures 55

56 D-Link Storage Area Network  D-Link Products for Storage Area Network D-Link SAN  DSN-2100 Series DSN  DSN-3200 Series DSN DSN  DSN-3400 Series DSN DSN xStack Storage with 8-port 1GE Copper for SATA-II Hard Drives in RAID Levels 0, 1, 1+0, and 5 (15 Trays) xStack Storage with 1-port 10 GE Fiber for SATA-II Hard Drives in RAID Levels 0, 1, 1+0, and 5 (15 Trays) xStack Storage with 4-port 1GE Copper for SATA-II Hard Drives in RAID Levels 0, 1, 1+0, and 5 (8 Trays)

57 Components of D-Link DSN-2100 Series  Components of D-Link SAN D-Link SAN 57 Removable Bezel Key lock Latch Front Panel Components Back Panel Components Power LEDBoot and Fault LED Eight drive bays Drive power LEDDrive and Activity Fault LED Front panel after the bezel has been removed Power Supply Management Port Diagnostic Port Host network connections Power Switch Reset Switch

58 Components of D-Link DSN-3200 Series  Components of D-Link SAN D-Link SAN 58 Front Panel Components Back Panel Components Key lock Removable Bezel Power Switch Reset Switch Host Network Connections Diagnostic PortManagement Port Power Supply

59 Components of D-Link DSN-3400 Series  Components of D-Link SAN D-Link SAN 59 Back Panel Components Power Switch Reset Switch Host Network Connections Diagnostic PortManagement Port Power Supply Front Panel Components Key lock Removable Bezel

60 Management Port and Diagnostic Port  Management Port The management port is used to configure and manage D-Link’s xStack SAN from the PC, either directly connected to the SAN (using a Crossover cable) or connected to the SAN through the use of a hub or switch (using Straight-through cable). By connecting to this management port, the administrator can configure the D-Link SAN through the web GUI.  Diagnostic Port The diagnostic port is a console port which uses a RS-232-to-DB-9 port interface. This port can be used if you have direct physical access to the box and is accessed during startup. The diagnostic port performs all admin password resets, sets the download configuration parameters, and accesses the Enclosure Services Test Tool.  Components of D-Link SAN D-Link SAN 60

61 DSN-2100 Series  D-Link DSN-2100 Series D-Link SAN 61 Hardware Specification Drive Bays: 8 Drive Interface support: SATA-II Storage Capacity: 8TB capacity with 1TB hard drive System Memory: 256MB to 512MB (512MB standard) Cache Memory: 256MB to 4Gb (512MB standard) iSCSI Network Interface: four (4) 1GbE ports iSCSI Network Interface Host Interface: iSCSI Draft 2.0 compliant initiator Connections: 1,024 Hosts Jumbo Frames support Link Aggregation support CHAP authentication Access control of management iSCSI/TCP/IP Full HW Offload VLAN Support (Up to 8 VLANs) Storage Management Embedded IP-based Management GUI SMI-S version 1.1 Volume and RAID support Single RAID Controller (Integrated in ASIC) RAID support (Level 0, 1, 1+0, 5) Supports 1,024 Virtual Volumes (256 accessible per initiator) 1,024 target nodes Online capacity expansion Hot swappable drives Instant volume access Free space defragmentation Auto-detection failed drive Auto-rebuild spare drive RAID level migration Drive roaming-in power off Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T)

62 DSN-3200 Series  D-Link DSN-3200 Series D-Link SAN 62 iSCSI Network Interface Host Interface: iSCSI Draft 2.0 compliant initiator Connections: 1,024 Hosts Jumbo Frames support Link Aggregation support CHAP authentication Access control of management iSCSI/TCP/IP Full HW Offload VLAN Support (Up to 8 VLANs) QoS support (IETF DiffServ and IEEE 802.1P tag) Storage Management Embedded IP-based Management GUI SMI-S version 1.1 Hardware Specification Drive Bays: 15 Drive Interface support: SATA-II Storage Capacity: 15 TB capacity with 1TB hard drive System Memory: 512MB Cache Memory: 4GB iSCSI Network Interface: eight (8) 1GbE ports Volume and RAID support Single RAID Controller (Integrated in ASIC) RAID support (Level 0, 1, 1+0, 5) Supports 1,024 Virtual Volumes (256 accessible per initiator) 1,024 target nodes Online capacity expansion Hot swappable drives Instant volume access Free space defragmentation Auto-detection failed drive Auto-rebuild spare drive RAID level migration Drive roaming-in power off Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T)

63 DSN-3400 Series  D-Link DSN-3400 Series D-Link SAN 63 Hardware Specification Drive Bays: 15 Drive Interface support: SATA-II Storage Capacity: 15 TB capacity with 1TB hard drive System Memory: 512 MB Cache Memory: 4GB iSCSI Network Interface: one (1) 10GbE ports iSCSI Network Interface Host Interface: iSCSI Draft 2.0 compliant initiator Connections: 1,024 Hosts Jumbo Frames support CHAP authentication Access control of management iSCSI/TCP/IP Full HW Offload VLAN Support (Up to 8 VLANs) QoS support (IETF DiffServ and IEEE 802.1P tag) Volume and RAID support Single RAID Controller (Integrated in ASIC) RAID support (Level 0, 1, 1+0, 5) Supports 1,024 Virtual Volumes (256 accessible per initiator) 1,024 target nodes Online capacity expansion Hot swappable drives Instant volume access Free space defragmentation Auto-detection failed drive Auto-rebuild spare drive RAID level migration Drive roaming-in power off Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T) Storage Management Embedded IP-based Management GUI SMI-S version 1.1

64 Key Selling Points of D-Link SAN  Block data transfer over TCP/IP network using iSCSI  Highly integrated single chip solution  Built-in RAID controller  Built-in IP-SAN Device Manager (IDM)  SATA-II support for the hard drive interface  Various number of iSCSI interfaces which can be aggregated  Jumbo Frame support increases performance up to 20-50%* * Based on information from Storage Networking Industry Association  Market Analysis for D-Link SAN Products D-Link SAN 64

65 Product Positioning for D-Link SAN  The D-Link xStack Storage product family of iSCSI SAN solutions are designed to address the growing high performance storage requirements brought about by the need for better application and database performance, infrastructure consolidation, and robust backup and disaster recovery solutions.  D-Link now aggressively addresses these storage requirements at the SMB and enterprise level users by leveraging existing iSCSI and Ethernet technologies and lowering the total cost of ownership for storage area networking solutions over more complex legacy Fiber Channel and slower Network Attached Storage (NAS) solutions. DSN-2100/ DSN-3200 comes with Gigabit Copper interfaces and is mainly targeted at SMB users. DSN-3400 comes with 10-Gigabit Ethernet interfaces* and is mainly targeted for enterprise users. * DSN-3400 provides one 10GbE XFP transceiver interface (transceiver sold separately) accessed via the back panel.  Market Analysis for D-Link SAN Products D-Link SAN 65

66 Storage Interoperability – SMI-S Storage Device  Storage Management Initiative – Specification (SMI-S) is a storage standard developed and maintained by Storage Networking Industry Association (SNIA).  The main objective of SMI-S is to guarantee interoperability of storage devices among different vendors.  D-Link’s SAN series are all designed based on the standard SMI-S version 1.1.  D-Link SAN Implementation D-Link SAN 66

67 Caching Operation  The xStack storage unit contains cache memory for storing and data.  The xStack storage unit is capable of caching write operations. Write-back caching saves the system from performing many unnecessary write cycles to the system RAM, so as to provide faster execution.  D-Link SAN Implementation D-Link SAN 67

68 Basic iSCSI SAN Implementation  D-Link SAN Implementation D-Link SAN  In the most basic iSCSI SAN deployment, application servers (iSCSI hosts) access their storage from an iSCSI target storage array. 68 Private LANPublic LAN …… iSCSI Target iSCSI Host

69 Summary: D-Link SAN  D-Link provides three series for its SAN appliance product line which include DSN-2100, DSN-3200, and DSN-3400 series.  D-Link DSN-2100 provides eight drive bays while D-Link DSN-3000 series provides 15 drive bays.  Generally, all D-Link SANs must have the following components built in: host network connections, management port, diagnostic port, power and reset switch button, power supply, and removable bezel.  D-Link SAN appliances are mainly targeted for SMB and enterprise level users who need better application and database performance, infrastructure consolidation, robust backup and disaster recovery solutions.  D-Link SAN series is guaranteed to be interoperable with other storage appliances from different vendors because of its achievement for SMI-S standard.  By default, all D-Link SANs will cache all write operations to prevent the storage from performing many unnecessary write cycles to the system RAM.  Summary D-Link SAN 69

70 Questions and Answers: D-Link SAN 1.What standard is used to guarantee the interoperability of storage devices among different vendors? A.IEEE B.iSCSI C.SNIA D.SMI-S 2.Which of the following statement describe D-Link SAN? A.D-Link SAN supports PAP authentication to provide secure access to the SAN. B.With D-Link SAN, using diskless server is possible because it can be booted form the iSCSI SAN. C.D-Link xStack storage cache memory for storing data and writing operations.  Questions and Answers D-Link SAN 70

71 DCS – Storage SAN Product Features Overview* 71 * All features are explained based on DSN-3000 Series.

72 SAN Product Features Overview After this section, you should gain more knowledge of the following: 1.Tasks/activities that can be done by D-Link SAN 2.Link aggregation and VLAN features supported in D-Link SAN 3.TCP/IP offload engine 4.CHAP authentication 5.Volume virtualization 6.Auto-Detection failed drive and volume rebuild features 72

73 Task  The xStack Storage unit can automatically, or at the administrator’s demand, perform activities that take time and consume the controller’s resources.  The administrator can control, to some degree, when tasks are to be performed. Any task can be suspended and resumed by the administrator. Some tasks can be cancelled and some can be scheduled on a recurring, periodic interval.  All tasks can have their priority changed, which controls the amount of resources the xStack storage unit devotes to a task.  The tasks/ activities that can be done by D-Link’s SAN are as follows:  Volume initialization  Volume rebuild*  Volume expansion  Media scanning  Parity scanning * Volume rebuild will be explained later along with explanation of auto-detecting failed drive  Volume Management SAN Product Features Overview 73

74 Volume Initialization  Some volume organizations (e.g. parity) require initialization. The initialization task performs this action. This task can be performed while an initiator is accessing (reading and writing) data. An initialization task can be suspended and resumed, but cannot be cancelled.  Initialization task consists of: Making the volume XOR consistent Detecting a read error Recovering from read error  Volume Management SAN Product Features Overview 74

75 Volume Expansion  Volume Management SAN Product Features Overview  All D-Link SAN product series provide volume expansion to flexibly resize a logical drive GB 200GB Volume-1 Current size: 200GB Expand to 300GB 100GB The Volume-1 has been resized to a bigger size Page is Animated

76 Parity Scanning  Volume Management SAN Product Features Overview  D-Link SAN provides parity volume scanning to check errors found in that selected volume.  This task reads every block in the volume to ensure parity is correct. If parity errors are found, this task corrects the errors. 76

77 Storage Volume Information  Volume Management SAN Product Features Overview  Storage volume information provides comprehensive information about the storage volume allocation  Information that can be viewed in the storage volume information are: Status of the attached drives (offline or online) Volume Capacity Volume type 77

78 Event Log  Device Management SAN Product Features Overview  The event log tracks the xStack Storage’s information, warning, and error messages. 78

79 Link Aggregation  iSCSI Features SAN Product Features Overview  Definition of Link Aggregation: Link aggregation is a way to achieve double data rates by aggregating multi physical links as one logical link.  Key benefits of Link Aggregation (LAG): Improved performance High data rates Increased availability Load sharing 79

80 Virtual LAN (VLAN)  All D-Link Storage Area Networks support 802.1Q VLAN tagging to segregate traffic into isolated zone for more secure access and to segment the broadcast domain.  D-Link SAN supports up to eight VLANs with 1-to-1 mapping between IP subnet and VLAN. Multiple VLANs per physical port with VLAN tag. All physical ports in LAG belong to same VLAN.  With this feature, a volume can be configured under a VLAN group so that it will only be accessible by clients under the same VLAN.  iSCSI Features SAN Product Features Overview 80

81 TCP/IP Offload Engine (TOE)  iSCSI Features SAN Product Features Overview  The major issue of IP storage is the high TCP/IP processing overhead, which constrains servers to performance levels that are unacceptable for block storage transport.  TCP/IP Offload is used for reducing the amount of TCP/IP processing handled by the microprocessor and I/O subsystem to help ease server networking bottleneck. 81

82 CHAP Authentication  Challenge Handshake Authentication Protocol (CHAP) is a protocol for authenticating peer-to-peer connection based on the sharing of a ‘secret’ known only to the authenticator and that peer.  CHAP authentication is supported in all D-Link SAN product series and is used when an initiator tries to connect to its target, and vice versa.  Characteristics of CHAP authentication:  Unidirectional/ Bidirectional authentication  Secret key is encrypted/ hashed using MD5 algorithm  Three way handshake authentication  iSCSI Features SAN Product Features Overview 82

83 Volume Virtualization  D-Link xStack storage virtualizes disk storage for use by a customer's host computer (servers).  Storage virtualization is the process of grouping together independent storage devices found across a network to create what seems to be a single large storage entity that can be centrally managed.  Storage virtualization helps make the tasks of backup, archiving, and recovery easier, and in lesser time, by disguising the actual complexity of the SAN.  Benefits of virtualization: High availability Improve capacity utilization Share resources between heterogeneous servers  Volume and RAID Support SAN Product Features Overview 83

84 Auto-Detection of Failed Drive & Volume Rebuild  When a drive in the storage array fails, the xStack storage will automatically detect the failed drive and substitutes it with the hot spare drive.  A spare drive is normally kept in the available pool, so that the drive will be available for use should another drive fails.  Volume rebuild is the activity that recovers data of a failed drive.  In this case, data can be rebuilt if the storage system is mirrored (RAID 1) or set for parity (RAID 5). If the storage is mirrored, data will be recovered from the mirrored data in the mirror disk. If parity is created, data inside the failed drive will be recovered using the existing data from active disks and the parity information.  Volume and RAID Support SAN Product Features Overview 84

85 Drive Roaming  Volume and RAID Support SAN Product Features Overview  D-Link SAN provides feature for safely moving drive in an array.  If a drive in an array configured with RAID is accidentally removed, the removed drive can still be recognized using this feature, as long as the drive is configured with RAID that provides fault tolerance (RAID 1 and RAID 5). This is known as drive roaming in power off. 85 Array configured with RAID 1 Drive-0Drive-1 Removed Steps to move the drives safely: Turn off the array in which the removed drive belongs to Plug the removed drive to any slot in the array Reboot the array Page is Animated

86 Self Monitoring and Reporting Technology (S.M.A.R.T)  D-Link SAN Series support Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.), a technology designed to monitor the reliability of hard drives.  The purpose of S.M.A.R.T. is to warn a user or system administrator of impending drive failure while time remains to take preventative action — such as copying the data to a replacement device.  Features of S.M.A.R.T. technology include a series of attributes, or diagnostics, chosen specifically for each individual drive model. Attribute individualism is important because drive architectures vary from model to model.  Volume and RAID Support SAN Product Features Overview 86

87 Summary: SAN Product Features Overview (1)  The xStack Storage unit can automatically, or at the administrator’s demand, performs activities such as volume initialization, volume rebuild, volume expansion, media scanning, and parity scanning.  Volume initialization is performed when an initiator (i.e. server) is reading or writing data.  With D-Link SAN, the size of a volume can be flexibly expanded up to the maximum capacity of a storage.  Media scanning provided in the management console of all D-Link SAN products can be used to scan a JBOD, stripe, mirrored stripe, or mirrored stripe media volume for errors.  D-Link SAN provides parity volume scanning to check errors found in the selected volume.  Task Manager provides general information for all task activity running on the D- Link SAN.  Storage pool information provides comprehensive information about the storage.  D-Link xStack Storage series accommodate a 6-cell shrink-wrapped battery pack for backing up the buffer cache contents in case of power failure.  D-Link SAN provides an event log feature that tracks the xStack Storage informational, warning, and error messages  To increase the data transfer performance and prevent bottleneck from occurring, D-Link SAN is provided with link aggregation feature to double the speed performance, depending on the number of the aggregated links.  Summary SAN Product Features Overview 87

88 Summary: SAN Product Features Overview (2)  All D-Link Storage Area Networks support 802.1Q VLAN tagging to segregate traffic into isolated zone for more secure access.  TCP/IP Offload is used to reduce the amount of TCP/IP processing handled by the microprocessor and I/O subsystem to ease server networking bottleneck.  CHAP authentication provides secured and encrypted authentication mechanism, and is supported in all D-Link SAN product series. It is used when an initiator tries to connect to its target, and vice versa.  D-Link xStack storage virtualizes disk storage for use by a customer's host computer (servers) by grouping all storage devices found across a network to become a single large storage entity that can be centrally managed.  When a drive in the storage array fails, xStack storage will automatically detect the failed drive and substitute the failed drive with the hot spare drive.  S.M.A.R.T. is a technology supported in D-Link SAN series to monitor the reliability of hard drives and to warn a user or system administrator of impending drive failure while time remains to take preventative action  Summary SAN Product Features Overview 88

89 Questions and Answers: SAN Product Features Overview 1.What tasks can be done by D-Link Storage Area Network? (Choose all that apply) A.Volume Initialization B.Media Scanning C.Volume Rebuild D.Error Correction E.Volume Shrinkage 2.What cannot be done when an administrator expands a volume and initializes a grow task? A.Grow task deletion B.Grow task suspension C.Grow task resumption D.All of the above can be done when a grow task is initialized 3.What is the function of TCP/IP Offload Engine in D-Link SAN A.To bypass requests coming from the client over the network when the storage’s CPU is high B.To turn off the xStack storage when it detects the TCP/IP utilization is high C.To safely move drive in an array by turning off the unit D.To reduce the amount of TCP/IP processing handled by the microprocessor and I/O subsystem  Questions and Answers SAN Product Features Overview 89

90 Questions and Answers: SAN Product Features Overview 4.What is the function of disk virtualization provided by D-Link SAN? A.To link multiple storage repositories to multiple clients and servers. B.To group all storage devices found across a network to become a single large storage entity that can be centrally managed C.To create storage clustering that comprises master storage and slave storage, where the slave serves as a backup of the master D.To achieve double data rates by aggregating multi physical links as one logical link. 5.What is the benefit of S.M.A.R.T.? A.Repair failed disk automatically by doing some diagnoses, analyze the main cause of the error, and perform reparation process depends on the analysis result. B.Provides 100% guarantee of disk failure prevention by regularly predicting each disk condition and provides maintenance to keep each disk in a good condition. C.Failure anticipation by regularly monitor all hard disks and report on various indicators of reliability, with the hope of anticipating failures. D.All of the above.  Questions and Answers SAN Product Features Overview 90

91 DCS – Storage D-Link Network Attached Storage (NAS) 91

92 D-Link Network Attached Storage (NAS) After this section, you should gain more knowledge of the following:  Various D-Link NAS appliances and differences between each of them  Key selling points of D-Link NAS appliances  Functions and applications of D-Link NAS  Product positioning of D-Link NAS 92

93 D-Link Network Attached Storage (NAS) DNS Bay SATA Network Storage Enclosure Built-in iTunes, UPnP and FTP Server May be used as USB 2.0 portable hard drive (become a DAS enclosure) DNS Bays SATA Network Storage Enclosure RAID 1 support Built-in iTunes, UPnP and FTP Server DNS Bays SATA Network Storage Enclosure RAID 1 support Built-in iTunes, UPnP, and FTP Server USB port for connecting to printer DNS Bays STA Network Storage Enclosure RAID 1, 5 support Multi-Functional USB port  D-Link Products for Network Attached Storage D-Link Network Attached Storage (NAS) 93

94 D-Link DNS-313  D-Link Products for Network Attached Storage D-Link Network Attached Storage (NAS) 94 Device Interface 1 Gigabit Ethernet port 1 USB 2.0 port* Supported Hard Drive Type One 3.5-inches SATA Standard Drive with capacity support up to 1.5 TB Features iTunes and UPnP AV server Scandisk feature Real-time backup alerts Permission settings for user and group Multi-language file name support Scheduled downloads from web or FTP sites Can be used as a USB 2.0 portable hard drive Networking Features DDNS FTP DHCP Server/ Client NTP HTTP/ HTTPS CIFS/SMB *USB port is used for connecting to a desktop or notebook as a USB2.0 portable drive.

95 D-Link DNS-321  D-Link Products for Network Attached Storage D-Link Network Attached Storage (NAS) 95 Networking Features DDNS FTP / FTP over SSL/TLS DHCP Server/ Client NTP HTTP/ HTTPS CIFS/SMB Jumbo Frames Device Interface 1 Gigabit Ethernet port Supported Hard Drive Type Two 3.5-inches SATA Standard Drive with capacity support up to 1.5 TB Drive Management Multiple hard drive configurations (RAID 0, RAID 1, JBOD, Standard) iTunes and UPnP AV server Scandisk feature User/ group Quota Management File Sharing Support RAID migration (non- RAID to RAID 1) Device Management Alerts Power Management Easy Search Utility Multilingual support

96 D-Link DNS-323  D-Link Products for Network Attached Storage D-Link Network Attached Storage (NAS) 96 Device Interface 1 Gigabit Ethernet port USB port* Features 4 different hard drive configurations (Standard, JBOD, RAID 0, RAID 1) iTunes and UPnP AV server Scandisk feature alerts Power management Supports BitTorrent USB port supports UPS monitoring and Print Server Support RAID migration (non- RAID to RAID 1) Networking Features DDNS FTP / FTP over SSL/TLS DHCP Server/ Client NTP HTTP/ HTTPS CIFS/SMB Jumbo Frames Supported Hard Drive Type Two 3.5-inches SATA Standard Drive with capacity support up to 1.5 TB *The USB port provided on D-Link DNS-323 is used to connect to the print server only

97 D-Link DNS-343  D-Link Products for Network Attached Storage D-Link Network Attached Storage (NAS) 97 Networking Features Jumbo Frame DDNS FTP / FTP over SSL/TLS DHCP Server/ Client NTP HTTP/ HTTPS CIFS/SMB Device Interface 1 Gigabit Ethernet port 1 USB 2.0 port Supported Hard Drive Type Four 3.5-inches SATA Standard Drive with capacity support up to 1.5 TB Drive Management Multiple hard drive configurations (RAID 0, RAID 1, RAID 5, JBOD, Standard) iTunes and UPnP AV server Scandisk User/ group Quota Management File Sharing Device Management UPS Monitoring Alerts Power Management Easy Search Utility Multilingual support ADS support Auto Power Recovery

98 OLED – Special Display on D-Link DNS-343  Organic Light-Emitting Diode (OLED) is a LED screen that displays information to enable the administrator to easily view and obtain the status and basic information of the DNS-343  Information that can be viewed from the OLED include: System Information – Hostname of the DNS-343 – Firmware version – IP address of the DNS-343 – Operating temperature Hard Drive Status – Space percentage used on the hard disk Server Status – Status of the printer server – Status of the UPnP AV server – Status of the iTunes server – Status of the FTP server  D-Link Products for Network Attached Storage D-Link Network Attached Storage (NAS) 98

99 Key Selling Point of D-Link NAS  File-sharing across the local network and Internet using FTP and HTTPS  Flexible options for array capacity, supporting up to 1.5TB  Easy installation  Users and Groups/Folder with Quota and permission rights (read/ write) management  Appliance servers for network users (printer server, UPnP AV server, etc)  iTunes automatic discovery of music stored on the NAS  Peer to Peer download client support  Market Analysis for D-Link NAS Products D-Link Network Attached Storage (NAS) 99

100 D-Link NAS Functions and Applications  Shares and backup files from multiple clients  Remote access via FTP  Streams music, photos, and videos from the NAS to a media player  Shares printer on the LAN  Connects to UPS for monitoring function  Downloads shared files from the Internet using BitTorrent  Stores recorded video surveillance directly  Market Analysis for D-Link NAS Products D-Link Network Attached Storage (NAS) 100 Remote Client (FTP: port 21)Obtains files stored in NAS D-Link Multimedia Player (UPnP AV) UPS Printer Connects through USB port (P2P Connection) Download shared file using P2P connection

101 Product Positioning for D-Link NAS  D-Link NAS products are suitable for home user, SOHO and SMB  D-Link Network Storage Enclosures address the ever-growing data storage requirements for multimedia and large data files for small to medium business users  Need for data consolidation and data sharing make this enclosure an ideal solution  Various RAID level support offers advanced data protection  This versatile enclosure supports the latest SATA technology and Gigabit Ethernet connectivity for best-in-class performance  Market Analysis for D-Link NAS Products D-Link Network Attached Storage (NAS) 101

102 Summary: D-Link Network Attached Storage (NAS)  D-Link provides four main models for its NAS appliance product line: DNS-313, DNS-323, DNS-321, and DNS-343.  All D-Link NAS appliances can be used to act as an iTunes server, UPnP server, FTP server, printer server, and for certain models, D- Link also supports added networking features such as a DHCP server, and advanced features such as quota management and DDNS, etc.  D-Link DNS-343 provides an added feature on the box, which is an OLED screen to show certain status information, such as system information, hard drive status, and the server appliance status.  D-Link NAS appliances are primarily targeted at home users, SOHO, or SMB users who want the benefits of network storage that is cost effective.  Summary D-Link Network Attached Storage (NAS) 102

103 Questions and Answers: D-Link Network Attached Storage (NAS) 1.Which model of D-Link NAS provides OLED screen feature on the box? A.DNS-313 B.DNS-323 C.DNS-321 D.DNS What are the functions of D-Link NAS? (Choose all that apply) A.Easy RAID migration and adaptability B.Play music from iTunes software with the music stored in NAS C.Stream music, photos and videos to a media server D.Wireless access of data in the NAS via wireless client 3.Which RAID features are supported by D-Link DNS-323? (Choose all that apply) A.RAID 0 B.RAID 1 C.RAID 5 D.RAID 10  Questions and Answers D-Link Network Attached Storage (NAS) 103

104 DCS – Storage NAS Product Features Overview* 104 *All features are explained based on the DNS-343 product

105 NAS Product Features Overview After this section, you should gain more knowledge of the following: 1.What is the Easy Search Utility and the functions supported in this feature 2.What is the Configuration Wizard and what configuration tasks are available to this wizard 3.What is Alerts 4.The characteristics of power management on D-Link NAS 5.Function of Disk Diagnostic feature 6.Purpose of user and group creation on D-Link NAS 7.The function of quota management 8.Appliance server roles with/without the use of USB port on D-Link NAS 9.Remote Backup 10.Peer-2-Peer (P2P) Downloads 11.Volume/File sharing on D-Link NAS and scheduled downloading 105

106 Easy Search Utility  Managing the Device NAS Product Features Overview  Easy Search Utility is provided to help the users find the D-Link NAS on the network.  What D-Link Easy Search Utility can:  Discover and connect to D-Link NAS products.  Map drives  Configure the IP of the NAS 106

107 Configuration Wizard  Managing the Device NAS Product Features Overview 107

108 Alerts  With the alerts feature supported in the D-Link NAS product series, alerts can be sent to a specified user if certain operational conditions occur, such as the following: Information about space status A volume is full A hard drive has failed Administrator password has been changed Firmware has been upgraded System temperature has exceeded the specified temperature*  Managing the Device NAS Product Features Overview 108

109 Power Management on D-Link NAS  Managing the Device NAS Product Features Overview  Power management offers a green feature on D-Link NAS products.  With this feature, the administrator can configure the drives to shut down after a specified idle time. The device will automatically power up when data is being accessed by the client. 109

110 Disk Diagnostic  Managing the Device NAS Product Features Overview  Scandisk activity can be performed to check if any error has occurred on the hard disk.  With this feature, all errors found will be listed with a description, along with the option to repair each of these errors.  Scandisk can be performed over selected volume. 110

111 User and Group Creation  User and Group Management NAS Product Features Overview  User and groups can be created and managed on the D-Link NAS product series.  The purpose of creating users and groups on the NAS product is to control user access to the storage and to control read/write privileges for specified folders on the network drives, or to setup FTP access rights. 111

112 Network Access  User and Group Management NAS Product Features Overview  The Network Access feature is used to assign access rights to a user or a group for specific folders or volumes. 112

113 Quota Management  User and Group Management NAS Product Features Overview  The D-Link NAS product series supports quota management for groups, folders, and individual users.  Assigning quotas to a groups, folders, or users will limit the amount of storage capacity allocated for them. 113

114 Quota Illustration  User and Group Management NAS Product Features Overview 114 D-Link NAS Robert Volume-1 Quota limit for Robert is 1GB Saves 600MB data to volume-1 Current available space for Robert is 1GBData saved!!! Current available space for Robert is 400MB Saves 300MB data to volume-1 Data saved!!! Current available space for Robert is 100MB Saves 200MB data to volume-1 Saving Data Failed!!! Quota Exceeded!!! Page is Animated

115 FTP Server  Appliance Servers NAS Product Features Overview  The D-Link NAS product series are equipped with a built-in FTP Server. With this feature, data resources kept in the NAS can be accessed via FTP, both from the inside and outside network. 115

116 UPnP AV Server  Appliance Servers NAS Product Features Overview  UPnP (Universal Plug and Play) is a set of network protocols that allows devices to connect seamlessly and to simplify the implementation of networks in the home digital environment (data sharing, communications, and entertainment) and/or corporate environments.  UPnP AV (Audio and Video) servers store and share digital media, such as photographs, movies, and music to provide hardware-based media streaming services to UPnP AV compatible clients on the local network. 116

117 iTunes Server  Appliance Servers NAS Product Features Overview  D-Link NAS comes with a feature in which end users can listen to music from iTunes at their own desk with the music files stored in the NAS.  With this feature, the iTunes software will automatically detect the folder specified by the administrator. Therefore the administrator must specify a folder that contains a collection of songs stored on the NAS. 117

118 iTunes at the Client Side  Appliance Servers NAS Product Features Overview 118 Song library stored on the D- Link NAS is automatically detected using the iTunes application on the client side D-Link NAS iTunes server feature is activated on the D-Link NAS Play music from the NAS with iTunes

119 DDNS  Dynamic DNS (DDNS) allows the hosting of a server using a domain name assigned with a dynamic IP address. DDNS helps to deal with servers publishing IP addresses that constantly change due to the use of dynamic IP addresses. In the D-Link NAS product series, the DDNS feature can be used to make the NAS accessible from a public network.  D-Link provides a utility for customers to use the DDNS service provided by (only 1 host may be created using the D-Link DDNS service).  Free DDNS service can also be obtained from  Networking Features NAS Product Features Overview 119

120 Remote Backup  Networking Features NAS Product Features Overview  The D-Link NAS Remote Backup allows you to backup the files stored on the NAS to one or more remote NAS devices in order to prevent data loss in the event of a failure. 120

121 Peer-2-Peer (P2P) Download  Networking Features NAS Product Features Overview  The D-Link NAS P2P Downloads allows the user to share files and folders via torrents. This is a great way to share files with friends, colleagues, and family. 121

122 File Sharing  D-Link NAS provides two ways to share files to all users over the network  Samba Samba is an Open Source/Free Software suite that provides seamless file and print services to SMB/CIFS clients and allows interoperability between Linux/Unix servers and Windows-based clients. FTP  For file sharing, D-Link also provides multilingual support for the local user to easily share files without any difficulties. Samba: Unicode FTP Client: – Croatian, Cyrillic (Kyrgyz Republic), Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovenian, Spanish, Swedish, Traditional Chinese, Turkish.  Networking Features NAS Product Features Overview 122

123 Scheduled Downloading  Networking Features NAS Product Features Overview  The D-Link NAS Download Scheduling feature allows the administrator to set up a schedule for downloading folders or files, and backup sessions. 123

124 Print Server  USB Port Applications NAS Product Features Overview  The D-Link NAS can be directly connected to a printer to make the NAS become a print server. 124 Printer attached to the NAS can be accessed from the client side

125 UPS Monitoring  USB Port Applications NAS Product Features Overview  An Uninterruptible Power Supply (UPS) can be directly connected to a D-Link NAS through the provided USB port.  The purpose of attaching the UPS to the NAS is to provide a way to safely shutdown the NAS in case of a power failure.  When a UPS (Uninterruptible Power Supply) is connected to the NAS, the Status screen hides the printer information and displays information about the UPS (such as, the manufacturer, product type, battery power status, and UPS status). 125

126 Summary: NAS Product Features Overview (1)  The Easy Search Utility is a feature in D-Link NAS that helps make the administrator's task easier by displaying all the D-Link NAS products found within the subnet. Besides providing NAS discovery, it can also be used to map drives and configure IP addresses.  To make device configuration easier, D-Link NAS provides a configuration wizard to perform the basic configuration of the device. This is useful for some users who are unfamiliar with configuring the device.  alerts is a feature which warns a specified user, usually the administrator, when certain conditions, as specified by the administrator, are encountered.  Power management is a feature designed to help cut down on the energy used by the NAS. With this feature the D-Link NAS will automatically shutdown after being idle for some specified amount of time.  D-Link provides the Disk Diagnostic feature which can be used to perform error checking on a disk. This is to ensure the integrity of the data stored on the disk.  Users and groups can be created and managed on the D-Link NAS to better control user access to the data stored on the NAS. Quotas can also be applied to users/groups/folders.  Summary NAS Product Features Overview 126

127 Summary: NAS Product Features Overview (2)  All D-Link NAS can be set to act as application servers serving added functionality to its clients, such as to act as an iTunes server, UPnP server, FTP server, and print server.  Dynamic DNS (DDNS) is a feature which can be used to host a server using a dynamic IP address by giving the host a domain name so it is accessible by the public.  With a NAS appliance, file sharing over the network becomes much easier by sharing a volume all at once using the drive mapping feature. File sharing can also be done by using FTP or Samba.  The D-Link NAS appliance can be instructed to perform scheduled downloading from a specified URL.  An Uninterruptible Power Supply (UPS) can be connected to a D- Link NAS through the provided USB port to provide a safe shutdown after a power failure.  Summary NAS Product Features Overview 127

128 Questions and Answers: NAS Product Features Overview 1.What is the function of the Easy Search Utility feature? A.To search for files stored in the D-Link NAS based on keywords or file extensions. B.To find errors that have occurred on the D-Link NAS. C.To discover D-Link NAS products over the network. D.To search the activity history saved on the D-Link NAS. 2.What feature on D-Link NAS is used to check errors that have occurred in the hard disk? A.Scan Disk B.Media Scanning C.Parity Scanning D.Disk Scanning 3.How many concurrent users are allowed to access FTP in D-Link NAS? A.1 B.4 C.10 D.Unlimited 4.What are the purposes of USB port provided in D-Link NAS? (Choose all that apply) A.To make the NAS become a print server if connected to a printer from the USB port. B.To connect to iPod to synchronize music from the iPod to the NAS. C.To connect to a USB scanner so it can scan a file directly. D.To connect to a UPS to enable a safe shut down upon power failure.  Questions and Answers NAS Product Features Overview 128

129 Questions and Answers: NAS Product Features Overview 5.What feature must be used to publish a D-Link NAS for public access when it is assigned a dynamic IP address rather than a static IP address? A.DNS B.FTP Server C.D-Link UPnP AV Server D.DDNS 6.What are the appliance server functions supported by D-Link NAS? (Choose all that apply) A.iTunes Server B.DNS Server C.FTP Server D.Web Server E.UPnP AV Server 7.What is the method used to share files on the D-Link NAS if using remote access? A.DNS B.FTP C.Telnet D.SSH  Questions and Answers NAS Product Features Overview 129

130 DCS – Storage Applications and Solutions for Network Storage 130

131 Applications and Solutions for Network Storage After this section, you should gain more knowledge of the following: 1.NAS application for sample reference 2.SAN application for sample reference 131

132 NAS Application for SMB Environment  NAS Applications Applications and Solutions for Network Storage 132 Wireless Router The USB port can be attached to a UPS or USB Printer DNS-343 Wireless Clients Wireless LAN Wired LAN Guest-1 Guest-2 Employee-1 Employee-2 Printer is shared by the NAS, therefore can be accessed over the network

133 SAN Application for Server Clustering  SAN Applications Applications and Solutions for Network Storage  Server clustering is a group of servers running the same application as a single virtual server.  Server clustering prevents a single point of failure. If a server is goes down, another server will replace it and take the role of the primary server.  In this scenario, the clustered servers share the same disks in the SAN. 133 Clustered ServersClustered ERP Servers Goes to Public Network iSCSI SAN Tape Libraries

134 SAN Application for Monitoring Purposes  SAN Applications Applications and Solutions for Network Storage 134 Links are aggregated Gigabit Ethernet Switch SAN Storage Video Server with iSCSI initiator Wired Video Cameras Wireless Camera D-Link Wireless N Router Video Post Processing Server Recorded videos from all cameras are stored directly into the SAN storage Backup Storage


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