1. Nexsan iSeries™ iSCSI and iSeries Topologies Name Brian Montgomery
Title Technical Director
Phone:
Mobile:
URL:
Nexsan iSeries™ iSCSI & iSeries Topologies GA A

2. Old Way – Direct Attached Storage NEW Way – iSCSI SAN Attached
DAS = Old Way
Nexsan iSeries™ iSCSI SAN = New Way
The old way – data and storage are direct attached – difficult to share, manage and protect
The New Way – Data and storage are iSCSI SAN attached – easy to share, manage and protect
Virtualization
Mirroring
Replication
Snapshots
Data Migration
Old Way – Direct Attached Storage
NEW Way – iSCSI SAN Attached
Nexsan iSeries
Shared storage pool
Nexsan iSeries™ iSCSI & iSeries Topologies GA A

3. iSCSI Key Advantages Low TCO Know How Ubiquitous Software
Use server onboard Ethernet, NICs, or 3rd party TOE (TCP Offload Engine)
Use regular Ethernet switches for networking
Low to zero software costs
Know How
Well known protocol to IT managers
Simple to set up on server and storage
Ubiquitous Software
Software initiators built in to Windows, VMware, Solaris Linux, etc.
Particular Good Fit for Server Virtualization
Software initiators can run in virtual machine
IP based so very easy to transfer for high availability
Low TCO, excellent fit to server virtualization project goals
Nexsan iSeries™ iSCSI & iSeries Topologies GA A

4. iSCSI Protocol Encapsulation of SCSI commands and data over TCP/IP
SCSI Commands/Data
Merge This slide with the slide of iSCSI benefits
IP Network
Nexsan iSeries™ iSCSI & iSeries Topologies GA A 4

5. How it Works – Physical Servers
Application
Operating System
File System
iSCSI Software Initiator
Any NIC or TOE
Any Ethernet
iSCSI Target
SCSI commands are extracted from
the iSCSI packet and are executed on the physical storage
Nexsan iSeries™ iSCSI & iSeries Topologies GA A 5

6. FC Connected Nexsan Storage
Nexsan iSeries - Entry Level iSCSI SAN
Nexsan iSeries
Entry Level
A complete iSCSI SAN
Includes enterprise-class storage services
High density-highly scalable
Scale up to 1PB (petabyte)
Nexsan “GREEN” AutoMAID
Includes:
Storage pooling and virtualization
Snapshots, mirroring and replication
Production Site
Clients on an
IP LAN
Application Servers
iSCSI SAN
Nexsan iSeries - SAN
FC Connected Nexsan Storage
Nexsan - SATABoy
Nexsan iSeries™ iSCSI & iSeries Topologies GA A

7. Nexsan iSeries - Entry Level iSCSI SAN
Clients on an IP LAN
Application Servers – iSCSI connected
1Gb IP Switch
1Gb non-blocking IP network
Nexsan iSeries (200i, 400i)
Nexsan SAS storage pool with redundant FC connections to iSeries
Nexsan SATA storage pool with redundant FC connections to iSeries
Nexsan iSeries™ iSCSI & iSeries Topologies GA A

8. Nexsan iSeries - Enterprise Level iSCSI SAN
A complete iSCSI SAN
Includes enterprise-class storage services
Integrated Nexsan SAS and SATA storage
High reliability and performance
High density-highly scalable
Scale up to 1PB (petabyte)
Nexsan “GREEN” AutoMAID
Includes:
Storage pooling and virtualization
Snapshots, mirroring and replication
Redundancy and multi- pathing
Production Site
Clients on an
IP LAN
Application Servers
iSCSI SAN
Nexsan –Clustered iSeries SAN
FC Connected
Nexsan Storage
Nexsan - SATABeast
Nexsan iSeries™ iSCSI & iSeries Topologies GA A

9. Nexsan iSeries - Enterprise Level iSCSI SAN
Clients on an IP LAN
Application Servers – iSCSI dual path connected
Redundant 1Gb non-blocking IP network
1Gb IP Switch
1Gb IP Switch
Redundant Nexsan iSeries (200i, 400i)
Nexsan SAS storage pool with redundant FC connections to iSeries
Nexsan SATA storage pool with redundant FC connections to iSeries
Nexsan iSeries™ iSCSI & iSeries Topologies GA A

10. Combine an FC SAN with an iSCSI SAN
Servers use both an FC SAN and an iSCSI SAN
Reduce storage costs by providing multiple storage tiers
Migrate old data to lower cost iSCSI
FC SAN
iSCSI SAN
Nexsan iSeries(TM) with Nexsan SATABeast
HP EVA
Nexsan iSeries™ iSCSI & iSeries Topologies GA A

11. Mirroring - Active / Active HA – site
Production Site
Production Site
Servers
using iSCSI
Servers
using iSCSI
IP Network / Campus LAN
Clustered Nexsan iSeries(TM) mirroring data to two independent arrays for high availability
Nexsan iSeries™
Nexsan iSeries™
Primary Data Path
Failover Data Path
Heartbeat Path
SATABeast Array
SATABeast Array
Nexsan iSeries™ iSCSI & iSeries Topologies GA A

12. iSCSI Failover Data Path FC Mirror/ failover Path
Unique iSeries Metro Cluster
HA Architecture for HA Virtual Server Environments
Site A
Site B
Guests
IP Network
Virtual Server Host
Heart-beat
iSCSI Failover Data Path
iSCSI Data Path
Heart-beat
Nexsan iSeries
FC Mirror/ failover Path
FC Connection
FC Data Path
Production IO
Nexsan
FC Storage
Nexsan iSeries™ iSCSI & iSeries Topologies GA A

13. Unique iSeries Metro Cluster – iSeries Appliance or Connection
Outage - HA Architecture for HA Virtual Server Environments
Site A
Site B
IP Network
Heart-beat
Heart-beat
FC Connection
Production IO
Dropped Paths
Nexsan iSeries™ iSCSI & iSeries Topologies GA A

14. Unique iSeries Metro Cluster – iSeries Storage Outage
HA Architecture for HA Virtual Server Environments
Site A
Site B
IP Network
Heart-beat
Heart-beat
FC Connection
Production IO
Dropped Paths
Nexsan iSeries™ iSCSI & iSeries Topologies GA A

15. Unique iSeries Metro Cluster – Site Outage
HA Architecture for HA Virtual Server Environments
Site A
Site B
IP Network
Heart-beat
Heart-beat
FC Connection
Production IO
Nexsan iSeries™ iSCSI & iSeries Topologies GA A
Dropped Paths

16. Nexsan iSeries™ Topologies GA012709-A