HPSU training HP Restricted October 17, 2001 Page 2 DDS Objectives Provide an overview of the key technical features of DDS Technology To introduce HPs DDS Technology product Family, and show where this technology is best deployed Compare HP products to our competitors Provide tools and references to further information DDS

HPSU training HP Restricted October 17, 2001 Page 3 Tape Technology Unit Shares: Dataquest DDS maintains its position as the leading tape technology The DLT/LTO category is the fastest growing DDS

HPSU training HP Restricted October 17, 2001 Page 4 Why is DDS Technology so popular? Low cost of ownership – drive & media combination offer lowest cost tape technology Good reliability – when used in the correct manner DDS is a Standard, manufactured by HP, SONY & Seagate. 4 successful generations, each building on the previous generation installed base DDS

HPSU training HP Restricted October 17, 2001 Page 5 DDS History DDS DDS-DC DDS-2 DDS-3 DDS-4 (1989) (1991) (1993) (1995) (1999) Enabling Tehcnologies Audio DAT 90m tape 120m tape125 m media Media spec DCLZ MP+ mediaIncreased bpi using PRML GroupsThinner Format C3 ECCtracks efficiency 150m tape Thinner tracks Native Capacity 1.3GB 2GB 4GB12GB20GB Transfer rate 183kB/s 360kB/s-750kB/s-1MB/s- 720kB/s1.5MB/s3MB/s DDS

HPSU training HP Restricted October 17, 2001 Page 6 HP DDS Product Family Native Capacity GB Native Performance GB/Hr HP DAT8i/e HP DAT24i/e/k/m DAT24x6i/e HP DAT40i/e/k/m DAT40x6i/e Note:DDS1 now obsolete

HPSU training HP Restricted October 17, 2001 Page 7 Other Technical Specifications DDS2DDS3DDS4 Primary Media usage for best performance 120m125m150m SCSI Interface & connector Single Ended Narrow SCSI way LVDS/SE 68 pin High Density Backwards compatibility Write/Read DDS1 (90m and 60m tapes) Write/Read DDS2 Write/Read DDS1 (90m and 60m tapes) Write/Read DDS3 Write/Read DDS2 Read-Only DDS1(90m) Engineering Features Firmware controlled equalization adjustment (no pots) Firmware upgrade over SCSI or Via Upgrade tape. Increased Format efficiency. Write read channel now PRML Super Head-Clean mode Active Drum Capstan cleaner Real time adaptive filtering Advanced sequence detection Each generation benefits from previous generation engineering enhancements

HPSU training HP Restricted October 17, 2001 Page 8 3 Current Generations of DDS DDS2 DDS3 DDS4 Mode Motor, drives all the mechanical loading/unloading and threading of tape. Head cleaner, operates as necessary under firmware control. On DDS4 the W/R pre- amp is mounted on the rotating drum to get better Signal to Noise (SNR) performance. Interchange Guaranteed

HPSU training HP Restricted October 17, 2001 Page 9 Cassette Switch Decoding l Holes in tape cassette inform the drive which type of tape is being used Write Protect Open=1 Closed=0 D D D=Datum hole Actual size

HPSU training HP Restricted October 17, 2001 Page 10 DDS Tape - Basics DDS

HPSU training HP Restricted October 17, 2001 Page 11 Read After Write Write 1 Write 2 Read 1 Read 2 The data written on the tape is read after the write operation and checked for integrity. DDS

HPSU training HP Restricted October 17, 2001 Page 12 DDS Format Details DDS

HPSU training HP Restricted October 17, 2001 Page 13 Moveable guides to “thread” the tape across the drum Capstan motor “drives” tape across the head. Pinch roller acts as to engage the capstan motor onto the tape to get effective “drive” Mechanical loading process DDS

HPSU training HP Restricted October 17, 2001 Page 14 DDS 2 DDS 3&4 Main Data 128 Blocks Main Data 96 Fragments Main Changes:  No ATF zones  Subcodes embedded along tracks  C1 Blocks - Fragments marginsubdataATFmarginsubdataATF margin Track Layout DDS

HPSU training HP Restricted October 17, 2001 Page 15 Track Details - DDS3&4 90° MarginPMain Data 96FragmentsMargin Fragment Detail Header Data blocks from a G4 Sub Group Fragment ID (0 - 91) Area ID Frame Number Sub Code Information x 4 Header Parity x2 (CRC) – Subcodes embedded along tracks – No ATF zones

HPSU training HP Restricted October 17, 2001 Page 16 Why PRML? Used On DDS3 & DDS4 (Partial Response Maximum Likelihood) Enables 2x bit density without reducing read head gap Head gap length 2x bit length 3 level detection used Recovers Signal to Noise Ratio (SNR) Read Head Read Head Peak detect PRML Decoded as part of a longer sequence DDS2DDS3&4 DDS

HPSU training HP Restricted Page 17 October 17, 2001 Some DDS 4 Engineering Enhancements

HPSU training HP Restricted October 17, 2001 Page 18 Front panel display ANY Activity - Load/Unload Activity - Read/Write Tape Loaded - Unit Offline Media Caution Fault Self-test in progress Off Flashing Green period=1 Second Flashing Green period=1/2 Second Green Amber Flashing Amber period=1 Second Key Tape Clean / Attention DDS

HPSU training HP Restricted Page 19 October 17, 2001 DDS Autoloaders Entry Level Automation

HPSU training HP Restricted October 17, 2001 Page 20 X: cartridge horizontal movement Y: cartridge vertical movement R: magazine rotation Z: magazine horizontal movement Y Y X X R R Z Z DDS autoloader – mechanism-basics Picker mechanism Robotics PCB fits here

HPSU training HP Restricted October 17, 2001 Page 21 DDS-4 Autoloader – Sample Usage Model 30GB Server This example illustrates how an automated backup could be set up for a 30GB capacity server to run for 3 months without manual intervention being required. DDS

HPSU training HP Restricted October 17, 2001 Page 22 Appropriate uses for DDS Technology Entry Level servers and workstations where the duty cycle does not exceed 3-4 hours per day Ideal for cost effective large scale file transfers between machines. Used on HP-UX systems to load the OS (using “ignite UX command”) On “intel” systems DDS with HP OBDR is ideal for protecting the operating system and applications disks from system crash, even if the main data is backed up by higher capacity tape drives. DDS Autoloaders ideal for remote office locations wanting to make backup as Automated as possible because of minimal IT staff. DDS

HPSU training HP Restricted October 17, 2001 Page 23 Ensuring a trouble free life with your HP DDS drive Use “native” tapes for best performance and reliability Previous generation media is rougher and if used frequently can increase head wear. Ensure drive streams test system can supply data quickly enough with HP performance assessment tool (PAT – NT & W2K) don’t “overload “ system during backups Clean drive weekly with cleaning cassette Don’t use autoloaders as big tape drives, this will exceed the designed duty cycles of the product Use DDS4 – it is extremely reliable with an AFR < 3% DDS

HPSU training HP Restricted Page 24 October 17, 2001 HP DDS COMPETITION For direct & indirect competition see Download the competitive folder (still current for DDS products) DDS

HPSU training HP Restricted October 17, 2001 Page 25 Summary of HP DAT advantages over competition #1 Market share in DDS technology (> 50%) HP reputation for reliability Widest Connectivity & Compatibility testing in the industry Comprehensive TapeWare software in every box OBDR – unique to HP DAT drives – quickest safest way to recover from a total system crash Express Exchange – 24Hr replacement + system matching warranty on HP servers HP DDS4 – fastest DAT drive available – here’s the proof! DDS

HPSU training HP Restricted October 17, 2001 Page 26 Hardware Setup Servers used HP LH4 and DELL 4300 Dual Processor Intel 2, 400 MHz 256Mb RAM SCSI Hard disk for optimum transfer Separate AHA2940 U2W to avoid bottlenecks Microsoft NT version 4 with latest service packs Latest versions of Backup Exec and ARCserve for Microsoft NT Backups included SQL, Exchange as well as single large data file and the OS DDS

HPSU training HP Restricted October 17, 2001 Page 27 Real-World Performance: Transfer Rates on a partially loaded server Whatever the server loading, HP SureStore DAT40 is still the best performer. The biggest factor affecting performance is the behaviour of the operating system and other processes running at the same time. But... DDS GBytes / hour 25% CPU Loading Quantum DLT 4000 Sony DDS4 (SDLT10000) Exabyte Mammoth Sony AITHP SureStore DAT % CPU Loading GBytes / hour Quantum DLT 4000 Sony DDS4 (SDLT10000) Exabyte Mammoth Sony AITHP SureStore DAT40

HPSU training HP Restricted October 17, 2001 Page 28 Average data file restore time under NT DDS

HPSU training HP Restricted October 17, 2001 Page 29 Summary DDS technology will still be the predominant volume tape technology well into 2006 DDS technology is still an ideal technology for entry level servers, workstations and unix servers because of its low total cost of ownership DDS getting a new lease of life protecting OS & Application HDDs, utilising HP’s unique OBDR capability When sold into the right environment DDS is a very reliable technology – especially HP DDS4 DDS

HPSU training HP Restricted Page 30 October 17, 2001 Digital Linear Tape DLT, DLT-VS80 and SuperDLT

HPSU training HP Restricted October 17, 2001 Page 31 DLT objectives understand the basic technology of digital linear tape understand the differences between DLT, DLT VS80 and SuperDLT tape and their compatibility & interchangeability be capable of specifying the correct technology for different customer requirements provide references for further resources DLT

HPSU training HP Restricted October 17, 2001 Page 32 HP DLT Family - introduction DLT technology originally developed by DEC and then acquired by Quantum DLT and SuperDLT tape are Quantum developed products sold by HP as SureStore DLT and SmartStorage products SureStore originally aimed at the reseller marketplace for IA32 servers. SureStore will become the ‘universal product’ in Q4 ’01 SmartStorage aimed at the enterprise HP-UX server with rack options Quantum sold low cost DLT design to Benchmark Systems, now marketed as DLT VS (Value Smart) range DLT

HPSU training HP Restricted October 17, 2001 Page 33 DLT roadmap GB 50GB DLT2000 DLT7000 DLT4000 DLT2000XT DLT600 DLT8000 data capacityGB(native) DLT-1DLT VS80 40GB 6MB/s 35GB 5MB/s40GB 3MB/s current products DLT

HPSU training HP Restricted October 17, 2001 Page 34 HP DLT Family of products SMART Storage products Enterprise servers DLT8000 SD class V,N, L and A Mid Range & High End Intel servers SureStore DLT80 SureStore products Workstations, entry level Intel servers DLT-1 and DLT-VS80 SureStore products DLT

HPSU training HP Restricted October 17, 2001 Page 35 HP DLT rack solutions SureStore Tape Array 5300 SureStore Tape Array 5500 rack solutions for PA-RISC, ia32 and ia64 servers September ‘01 DLT80m Ultrium 230m DAT24m DAT40m DVD ROM m Ultrium 215m module options DLT VS80m TA5300 & TA5500 TA5300 only DLT

HPSU training HP Restricted October 17, 2001 Page 36 DDS DAT40 DAT24 DAT40 DAT24 DLTUltrium Mid-range servers: LH3000 L-class Mid-range servers: LH3000 L-class Entry level servers: E800 A-class Entry level servers: E800 A-class Enterprise servers: LH6000 N-class Superdome Enterprise servers: LH6000 N-class Superdome DLT80 DLT-1 DLT-VS80 DLT80 DLT-1 DLT-VS80 Ultrium HP current DLT portfolio positioning DLT

HPSU training HP Restricted October 17, 2001 Page 37 What is DLT? Linear tape recording Data is written in linear tracks down the tape The read-write head moves vertically to change tracks Helical scan recording Rotating read-write heads tape wrapped around drum drum is set at an angle to the tape head rotation 90° drum wrap DLT

HPSU training HP Restricted October 17, 2001 Page 38 DLT technology features & benefits very gentle head to media interface head designed to self clean adaptive calibration techniques very long media and head life under extreme stress multi-level error detection & correction long head & media life low maintenance excellent interchange lower cost of ownership secure data storage DLT

HPSU training HP Restricted October 17, 2001 Page 39 what is DLT? - basics Diagram illustrates typical DLT tape path. Note the single spool cartridge. DLT

HPSU training HP Restricted October 17, 2001 Page 40 bottom edge of the tape top edge of the tape BOT EOT read-write head has 52 positions = 208 tracks total. DLT– 4 channel linear recording DLT8000 formats read-write head movement head tilts DLT

HPSU training HP Restricted October 17, 2001 Page 41 Scratch Area Calibration Area Directory Area Data BOT EOT Leader Splice DLT tape layout scratch area - used to set write currents, determine the optimal tape tension. calibration area - used to set the vertical position of the r/w head, density detection and align with data tracks for good interchange directory area - used for fast search BOT hole -physical beginning of tape (user data) EOT hole -physical end of tape DLT

HPSU training HP Restricted October 17, 2001 Page 42 BOT DLT tape III DLT tape IIIxt DLT tape IV 2 BOTs Cleaning tape 2 BOTs BOT 22.5 Ft 43.5 Ft 1 Ft Leader DLT media recognition system DLT

HPSU training HP Restricted October 17, 2001 Page 43 Head Tacho Interposer/ Write Protect Sensor Take-up spool Drive Hub Leader Tape Link buckling mechanism BOT/EOT sensor DLT load and unload tape cartridge DLT

HPSU training HP Restricted October 17, 2001 Page 44 DLT load sequence 1.Locate Edge of Tape 2.Find Calibration Tracks from Bottom of Tape 3.Find Calibration Tracks from Top of Tape 4.Develop Write Currents in Scratch Area 5.Read Directory 6.Erase Directory 7.Stop at BOT DLT

HPSU training HP Restricted October 17, 2001 Page 45 DLT performance tips - GENERIC SCSI transfers should be at least 16kByte blocks 32k blocks or bigger are preferred use variable block mode (not fixed mode) single large fixed blocks can work too Host capabilities CPU should be Pentium II Disks should be at least fast SCSI-2 Tape drive must have its own SCSI bus If parallel streaming, DLTs should not share a common bus Application (backup) software should use large buffers - 64KB in CA and Veritas DLT

HPSU training HP Restricted October 17, 2001 Page 46 Drive cleaning cleaning should only be performed when the cleaning light is ON use the correct cleaning tape the cleaning light is turned on: weak head signal during calibration hard (uncorrectable) read or write errors if the cleaning light is ON SCSI ‘request sense’ will return:cleaning request or cleaning required with status byte 18 = 81H use only the approved cleaning cartridge DLT

HPSU training HP Restricted October 17, 2001 Page 47 read head elements (4) write head elements (8) +/- 9deg DLT8000 read/write head DLT7000 and 8000 use symmetrical phase recording DLT

HPSU training HP Restricted October 17, 2001 Page 48 DLT8000 SPR1 recording format Track 0 Track 1 Track 2 Track 3 Bottom Edge of tape Tape Direction l Track Width mm DLT8000 symmetrical phase recording DLT

HPSU training HP Restricted October 17, 2001 Page 49 DLT8000 head tilt mechanism DLT

HPSU training HP Restricted October 17, 2001 Page 50 DLT8000/mechanism read write head assembly DLT8000 cartridge receiver take up spool (modified from DLT7000) guide rollers tachometer DLT

HPSU training HP Restricted October 17, 2001 Page 51 DLT-VS80 DLT7000 DLT8000 HP DLT front panel detail Tape unload button density select button DLT7000/8000 LEDs: write protect tape in use use cleaning tape operate handle density LEDs DLT

HPSU training HP Restricted October 17, 2001 Page 52 DLT8000/DLT VS80 technology differences DLT

HPSU training HP Restricted October 17, 2001 Page 53 DLT8000/DLT VS80 technology differences DLT

HPSU training HP Restricted October 17, 2001 Page 54 DLT8000, DLT VS80 compatibility DLT

HPSU training HP Restricted October 17, 2001 Page 55 DLT media and drive compatibility DLT