QuickSpecs

Overview

HP StorageWorks DLT VS Family Tape Drive
Backing up to tape is a key component of a complete storage strategy. Tape drives can be used for creating daily and weekly backups and tape allows customers to remove information off-site. Tape can be used for archival purposes to retain data for up to 30 years. The new HP StorageWorks DLT VS160 Tape Drive provides 160 GB capacity and 16 MB/s performance compressed. This is double the capacity and performance of the DLT VS80, reducing the overall cost of ownership, increasing the capacity in a single tape drive, reducing the number of cartridges needed to store the same amount of information and resulting in less downtime needed for back-ups. The DLT VS160 is a half-height drive based on DLT tape technology. Customers who have outgrown previousgeneration DLT drives can move to the DLT VS160 and get increased capacity and performance and backward-read compatibility with the DLT VS80 formatted media. The DLT VS160 media can be read by the SDLT 600 providing a longer-term upgrade solution when customers outgrow the DLT VS160.

What's New

HP StorageWorks DLT VS160 Tape Drive Increased Capacity With 160 GB capacity the DLT VS160 has double the capacity of the DLT VS80. Increased Performance The DLT VS160 transfers 16 MB/s of data, more than double that of the DLT VS80. Investment Protection The DLT VS160 is backward read compatible (BRC) with the DLT VS80. Ease of Management Supported by Library and Tape Tools (LTT), HP's unique management tool; making installation of tape drives easier and reducing down-time by troubleshooting errors. Value The DLT VS160 is a half-height drive with the price and capacity points to meet mid-range DLT customers' needs.

Models

DLT VS160, Internal, Worldwide DLT VS160, External, North America DLT VS160, External, International A7569B A7570B A7571B

DA - 11403

Worldwide Version 27 January 25, 2008

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Key Features
HP StorageWorks DLT VS160: Half-height, 5.25-inch form factor tape drives with DLT technology Maximum native storage capacity of 80 GB, with compressed capacity at 160 GB, assuming 2:1 data compression Maximum native data transfer rate of 28 GB/hour, up to 57 GB/hour with compression Utilizes industry standard DLT VS 1 Media Backward-read compatibility with data cartridges written in DLT VS80 format Can be read by the SDLT 600 tape drive HP Data Protector, HP Data Protector Express, VERITAS Backup Exec, CA BrightStor ARCserve, Yosemite TapeWare and native Windows support (the most recent list of backup applications supported can be found at http://www.hp.com/go/connect) Qualified behind Microsoft Windows 2000, Windows 2003, and Linux (Go to http://www.hp.com/go/connect for the most recent list of operating systems supported) Available in internal, external (tabletop), and rack-mount models Please check with http://www.hp.com/go/connect for more compatibility information.

Customer Benefits

Half-height form factor requires only half the space of traditional DLT drives providing customers with more flexibility in high density applications. Leaves more room inside the server for other options Can be rack-mounted in a 1U space The DLT VS drives are designed to provide the right price capacity point for the mid-range customer. Qualified on HP ProLiant server platforms and others. (Go To http://www.hp.com/go/connect for details.) Backward-read compatibility provides an easy migration path for customers outgrowing current tape products. DLT VS drives can be read by SDLT Tape Drives providing for an easy upgrade path to SDLT drives in the future. Improved management and ease of integration into existing environment with Library and Tape Tools (LTT). The DLT VS160 requires fewer data cartridges to complete data backup compared to the DLT VS80, lowering the customer's total cost of ownership. The DLT VS160 offers 100% improvement in performance and reduces the backup window for customers by as much as 50%. The DLT VS160 offers improved performance and reliability through enhanced technology inside the drive: Data path improvements create a more reliable drive Multi-channel thin-film MR head allows for increased capacity and performance The TapeSense circuitry reduces media load errors

Family Comparison

Drive Technology Capacity (compressed) Maximum Data Transfer (compressed) Buffer Firmware Upgradeable Maximum Drives per bus MTBF DLT VS 80 DLT Half-Height 80GB 6 MB/s 2 Yes, with L&TT 2 200,000 @100% DLT VS 160 DLT Half-Height 160 GB 16MB/s 16 Yes, with L&TT 2 250,000 @ 100%

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Product Highlights

DLT VS Technology

The DLT VS Tape Drives provide HP customers with value-capacity solutions that share much of the technology used other DLT tape drives. From its compatibility with previous-generation drives to its use of DLZ data compression and RLL encoding, DLT VS technology offers HP customers many of the same technological features found in previous generation DLT drives, while improving such features as capacity and performance.

Media and Drive Compatibility
HP recommends that you use HP-branded cartridges in your HP tape drives to assure the highest level of protection for your valuable data. HP's test program for HP DLT VS media is the most thorough and comprehensive in the industry. All HP cartridges must satisfy an exhaustive battery of additional tests that relate directly to real-life situations, where real data and real businesses are at stake. Non-HP cartridges, whilst fully compatible, are less optimized for use in HP tape devices. Your best choice for ease of support and maximum dependability is to use HP-branded DLT cartridges at all times. The DLT VS160 Tape drive uses the DLTtape VS1 160GB data cartridge and DLTtape VS160 cleaning cartridge. The DLTtape VS1 media is a new type of media with improvements over the DLT Type IV media used in the DLT VS80 drive. It offers higher capacity and improved reliability. The DLT VS80 Tape Drive utilizes HP DLTIV data cartridges as well as industry standard DLT Type IV media and DLT VS cleaning cartridges.

Software in the Box

The HP StorageWorks DLT VS tape drives include HP Data Protector Express Single Server Edition software. This easy to use backup application, based on Data Protector Express, robustly protects a single Windows, Linux or NetWare server. Also included is the Data Protector Express Bare Metal Disaster Recovery (BMDR) option which provides automated system recovery of the server following a major hardware or software failure. The fastest method to recovery the server is to use the Data Protector Express BMDR option and the One Button Disaster Recovery feature of the HP StorageWorks DLT VS tape drives. For more information about Data Protector Express Single Server Edition please visit: http://www.hp.com/go/dataprotectorexpress/sse. As well as getting the Data Protector Express Single Server Edition software as part of the HP StorageWorks DLT VS tape drives solution, purchasers can easily and economically upgrade to the classleading Data Protector Express backup/recovery software. This is a special part number, only available for registered users of Data Protector Express Single Server Edition that gives a significant discount off the regular price of Data Protector Express, to recognize the value of the in-box software. For more information about upgrading Data Protector Express Single Server Edition to Data Protector Express visit: http://www.hp.com/go/dataprotectorexpress/sse/upgrade. If the HP StorageWorks DLT VS tape drive is for a large environment that requires UNIX support and/or enterprise class application and feature support then HP Data Protector software is the recommended backup/recovery software. For more information and evaluation software please visit http://www.hp.com/go/dataprotector.

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Rack-mount Tape Options
The DLT VS160 is supported in the HP StorageWorks 1U and 3U Rack-mount Kits, allowing customer to install up to 2 internal DLT VS drives in a 1U rack-mount space or up to 4 internal DLT VS drives in a 3U rack-mount space, respectively. Standard configuration for 3U Rack-mount Kit provides two internal SCSI buses (channels) supporting one DLT VS drive per bus. Standard configuration for 1U Rack-mount Kit provides two internal SCSI buses (channels) supporting up to 2 DLT VS drives per bus. NOTE: Please refer to the Rack-mount Tape Drive Kits QuickSpecs for further information: http://h18000.www1.hp.com/products/quickspecs/10854_div/10854_div.html.

Library and Tape Tools

The HP StorageWorks HP StorageWorks DLT VS tape drive family is supported by HP's industry-leading diagnostic tool, HP StorageWorks Library and Tape Tools (L&TT). L&TT is a single, convenient program that's a snap to install and simple to operate. L&TT's intuitive user interface eliminates the need for training and deploys in less than five minutes. This tool can make integration of the drive into a network faster by troubleshooting any errors and firmware upgrades easier to manage. This robust diagnostic tool is designed for both the experienced professional and the untrained administrator. It ensures product integrity through self-diagnostics and fast resolution to device concerns. L&TT: Verifies installation of the drive Tests/verify the health of the drive and media Provides HP support with detailed device information Offers multiple options for finding and upgrading new firmware Performs performance optimization and recommendations Is included with each DLT tape drive and available via free download supporting all HP tape products Additional information on L&TT plus download information can be found at http://www.hp.com/support/tapetools.
Compatibility and Integration Testing
The DLT VS160 Tape Drives are fully supported and compatible with ProLiant, HP-UX, and Alpha Servers and controllers. Other platforms are also supported; please check http://www.hp.com/go/connect for detailed lists. HP thoroughly tests products with leading software and operating systems, including HP Data Protector, Data Protector Express, VERITAS Backup Exec, CA ARCserve, and Yosemite TapeWare.

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Compatibility
HP's extensive compatibility testing program assures that the HP StorageWorks DLT VS Tape Drives work with leading servers, operating systems, and backup applications - and not just those sold by HP. For the latest list of servers, workstations, operating systems, and backup software that support HP StorageWorks DLT VS Tape Drives, check the tape backup compatibility pages on our web site at: http://www.hp.com/go/connect.

HP Server Compatibility

The HP StorageWorks DLT VS160 tape drives are supported on the following classes of HP systems: HP ProLiant DL servers HP ProLiant ML servers HP Integrity servers HP 9000 servers HP AlphaServers HP workstations For details of which tape drive models work with which systems, including third-party (i.e. off-platform) systems, visit http://www.hp.com/go/connect for the latest hardware compatibility information.

OS Support

Microsoft Windows 2000 and Windows 2003 HP-UX Alpha Tru64 NOTE: Please visit http://www.hp.com/go/connect for the latest compatibility information. NOTE: The Data Protector Express in-box software supports Windows, Linux and NetWare.
Backup Software Support ISV Backup Software Platforms HP Data Protector HP Data Protector Express VERITAS Backup Exec for Windows NT/ Windows 2000 Computer Associates ARCserve 2000, for Windows NT/ Windows 2000 Yosemite TapeWare (Linux OS Support only) Native Operating System Backup Applications NOTE: Please visit http://www.hp.com/go/connect for the latest compatibility information.

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Service and Support, HP Care Pack, and Warranty Information
HP Care Pack Services offer upgraded service levels to extend and expand your standard product warranty with easy to buy, easy to use support packages that help you make the most of your hardware and software investments. They let you choose the support levels that meet your business requirements, from basic to mission-critical. They help you contain total cost of ownership. HP Care Pack warranty extensions can be purchased along with HP products to cost-effectively upgrade or extend your warranty. For many products, post-warranty HP Care Pack Services are available when your original warranty has expired. Why purchase an HP Care Pack service? Your standard warranty protects against product defects. HP Care Pack Services help you guard against unplanned downtime, which can reduce your productivity and profitability. These convenient service packages: Protect your investment in HP products Provide consistent, predictable levels of support across your entire department or business Ease budget planning with fixed-cost support that includes parts and labor Give you direct access to proven technical and problem-solving expertise Offer a choice of response-time and repair-time commitments Deliver prompt, measurable results Are available whenever and wherever you do business HP Care Pack availability may vary by country and product. Supporting your Adaptive Enterprise journey HP Services helps you make the Adaptive Enterprise real for your organization. The breadth, depth, and quality of HP hardware and software support services can help you improve the performance of your IT support processes and resolve the complex software and hardware problems that tax user productivity. HP Care Pack services help you increase IT environment stability, efficiency, and agility from the desktop to the data center, and improve the productivity of your employees. Hewlett-Packard provides a 3-year, next-day, parts exchange, limited warranty, for the StorageWorks Warranty and Services Included with the Product DLT VS160 Tape Drive, plus 9x5 phone support for the duration of the warranty. For more information about HP's Global Limited Warranty and Technical Support, visit: ftp://ftp.compaq.com/pub/products/storageworks/warranty/EN_321708-008.pdf

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Recommended Services
In order to maximize ROI and product uptime, and minimize the cost of ownership, Hewlett Packard recommends: 3 years 24 x 7 Hardware Support Guards against downtime, which reduces productivity and profitability Eases budget planning with fixed-cost support that includes parts and labor Direct access to proven technical and problem-solving expertise 3 years 24 x 7 Software Support Improve the productivity of system managers and operators Improve system performance and reduce downtime due to software defects Expedite problem resolution through expert-level technical resources Enjoy consistent service coverage across geographically dispersed sites Update HP and selected third-party software at a predictable cost Take advantage of subscription savings on software updates Keep your license compliancy up-to-date
Available HP Care Pack Extend your product warranty with a wide choice of cost-saving support packages. Services HP Care Pack Services are sold by HP and HP authorized enterprise and commercial resellers. Services for customers purchasing via direct and enterprise resellers are quoted using HP order configuration tools. Additional information about HP Care Pack Service features and benefits is available at http://www.hp.com/hps/carepack/services/. Key for HP Care Pack Service availability in the table below: E = Service available for customers purchasing direct and via enterprise resellers C = Service available for customers purchasing via commercial resellers N/A = Service not applicable HP Care Pack Services Deployment and Per Event Services HP Installation HP Installation & Startup HP Implementation For more information about Deployment and Per Event Services for HP Storage, visit http://www.hp.com/hps/storage/. Service Available E/C N/A N/A

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HP Care Pack Services Availability Services HP Next Day Hardware Support HP 4 Hr, 9x5 HW Support HP 4 Hr, 13x5 Hardware Support HP 4 Hr, 24x7 Hardware Support HP 6 HR Call-to-Repair HW Support HP Software Support HP Software Support 24x7 HP Support Plus HP Support Plus 24 HP Proactive Essentials 9x5, 10 SW Incidents HP Proactive Essentials 9x5, 25 SW Incidents HP Proactive Essentials 9x5 Unlimited HP Proactive Essentials 24x7, 25 SW Incidents HP Proactive Essentials 24x7, 50 SW Incidents HP Proactive Essentials 24x7 Unlimited HP Proactive 24 Service (*) HP Critical Service (*)
1 yr E/C E/C E/C E/C E/C E/C E/C E/C E/C N/A N/A N/A N/A N/A N/A E/C E/C 3 yr E/C E/C E/C E/C E/C E/C E/C E/C E/C N/A N/A N/A N/A N/A N/A E/C E/C 4 yr C C C C C C C C C N/A N/A N/A N/A N/A N/A N/A N/A 5 yr C C C C C C C C C N/A N/A N/A N/A N/A N/A N/A N/A
To find HP Care Pack Services available via HP authorized commercial resellers, visit http://h30125.www3.hp.com/csn/salesmktg/elfpack/elf_nonlkup_ctrylang.asp?code=ELNL
HP Care Pack Service Product Numbers

Enterprise & Commercial Purchased Care Packs ('A' stands for physical Care Pack, 'E' for electronic Care Pack) Product Number U2090A/E H3155A/E H4616A/E U2068A/E U6358A/E U9338A/E U9339A/E U9340A/E U9341A/E UA450PE UA451PE UA452PE UA453PE Enterprise Purchased Care Packs Product Description Tape Installation HW Installation Only HW, "3-year", "NBD", "9x5", "on-site"* HW, "3-year", "4-hour", "13x5", "on-site" HW, "3-year", "4-hour", "24x7", "on-site" HW, "3-year", "6hr CTR", "24x7", "on-site" HW, "4-year", "4-hour", "13x5", "on-site" HW, "4-year", "4-hour", "24x7", "on-site" HW, "5-year", "4-hour", "13x5", "on-site" HW, "5-year", "4-hour", "24x7", "on-site" HW, "1-year", "NBD", "9x5", "on-site", "Post Wty" HW, "1-year", "4-hour", "13x5", "on-site", "Post Wty" HW, "1-year", "4-hour", "24x7", "on-site", "Post Wty" HW, "1-year", "6hr CTR", "24x7", "on-site", Post Wty"

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Product Number HA113A1 HA101A3 HA103A3 HA104A3 HA105A3 HA106A3 HA107A3 HA106A3 HA107A3 HA109A3 HA110A3 HA111A3 HA112A3
Product Description Tape Installation HW Installation Only HW, "3-year", "next-day", "13x5", "on-site" HW, "3-year", "4-hour", "13x5", "on-site" HW, "3-year", "4-hour", "24x7", "on-site" HW, "3-year", "6hr CTR", "24x7", "on-site"* SW, "3-year", "Phone-in", "9x5" SW, "3-year", "Phone-in", "24x7" SW, "3-year", "Phone-in", "9x5" SW, "3-year", "Phone-in", "24x7" HW Only, Support Plus, "3-year", "13x5" HW Only, Support Plus 24, "3-year", "24x7" HW Only, Proactive 24, "3-year", "24x7"* HW Only, Critical Service, "3-year", "24x7"* DLT VS160 Band N/A N/A N/A N/A N/A DLT VS160 Install Band 596 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
NOTES: NOTES * Both Proactive 24 & Critical Service only relate to 'reactive elements', 'proactive elements' are available on time & materials basis. (SW is supported separately per package). The Care Pack information quoted above relates to 3 year offerings only, 1yr packs are available for each offering (replace A3 with A1).

eSupport

HP eSupport is a portfolio of technology-based services that assist you with managing your business environment - from the desktop to the data center. Support Portal The HP support portal provides one-stop access to the information, tools and services you need to manage the daily operations of your IT environment. Features include: Access to self-solve tools (including search technical knowledge base) Efficient logging and tracking of support cases Collaboration with other business and IT professionals Download of patches and drivers Access to diagnostic tools Proactive notification of relevant information Access to certain features of the support portal requires an HP service agreement. To access the support portal, visit http://www.hp.com/support

HP Education Services

For more information about HP Education Services for Storage and SAN, visit http://education.hp.com/curr-storsan.htm

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Additional Services Information
For more information about Deployment, Per Event, Consulting and Education services for HP Storage, visit: http://www.hp.com/hps/storage/ For more information about HP Care Pack Services for Storage, visit: http://www.hp.com/hps/carepack/storage/cp_networked.html For more information about HP Storage Software, services and updates, visit: http://h18006.www1.hp.com/storage/software.html If you have specific questions, contact your local HP representative. Contact information for a representative in your area can be found at "Contact HP" http://www.hp.com

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Options

Related Options

Media HP DLTtape VS1 160GB Data Cartridge NOTE: For use with the DLT VS160 Drive. HP DLT VS160 Cleaning Cartridge NOTE: For use with the DLT VS160 Drive. HP DLTtape IV Data Cartridge NOTE: For use with the DLT VS80 Drive. HP DLT1/VS Cleaning Cartridge C8007A C8016A C5141F C7998A
Host Bus Adapters, Controllers, and Accessories for ProLiant Servers
Please check http://www.hp.com/go/connect for the most recent list supported controllers. Some controllers may be out-of-date. Smart Array 6i Controller (integrated on system board on certain servers) NOTE: This controller is integrated only on HP ProLiant DL380 G4 servers. Integrated Single Channel Ultra320 SCSI Controller Integrated Dual Channel Ultra320 SCSI Controller 64-Bit/133-MHz Single Channel Ultra320 SCSI HBA G2 NOTE: This controller may also be used for connecting HP DLT VS tape drives to ProLiant or 3rd party server platforms such as Dell, IBM, and Sun. Please refer to the HP Tape Backup Products Compatibility website at http://www.hp.com/go/connect for more information. HP SC11Xe Host Bus Adapter NOTE: Recommended SCSI HBA for connecting Ultrium tape drives to ProLiant DL servers.

N/A N/A N/A 374654-B21

412911-B21
Host Bus Adapters, Controllers, and Accessories for HP PARISC and IPF servers
64-Bit/133-MHz Dual Channel Ultra320 SCSI Adapter Please refer to the HP Tape Backup Products Compatibility website at http://www.hp.com/go/connect for more information on support for HP PA-RISC and IPF servers.

A7173A

Host Bus Adapters, Controllers, and Accessories for HP AlphaServers
32-Bit PCI to Single Channel Wide-Ultra2 SCSI Adapter Triple-Function Combo Adapter: LVD / SCSI II, 10/100 UTP Ethernet, and 2D Graphics Dual Channel 64/66-MHz PCI-to-SCSI Ultra160 Host Bus Adapter
3X-KZPCA-AA 3X-DEPVZ-AA 3X-KZPEA-DB
Host Bus Adapters, Controllers, and Accessories for 3rd Party servers and workstations
64-Bit/133-MHz Single Channel Ultra320 SCSI HBA G2 NOTE: This SCSI controller supports a wide range of connectivity to non-HP 32-bit servers. Please refer to the HP Tape Backup Products Compatibility website at http://www.hp.com/go/connect for more information on support for non-HP 32-bit server platforms using your HP SDLT tape drive. Please refer to the HP Tape Backup Products Compatibility website at http://www.hp.com/go/connect for more information on SDLT support for non-HP servers using third-party controllers and adapters.

374654-B21

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1U Rack-mount Kit, Worldwide NOTE: Please refer to web page for further information: http://h18006.www1.hp.com/products/storageworks/3urackmount/index.html 3U Rack-mount Kit, Worldwide NOTE: Please refer to web page for further information: http://h18006.www1.hp.com/products/storageworks/3urackmount/index.html

A7445B

274338-B22

Software

Data Protector Express backup/recovery software

BB117ET

Cable Kits
68-pin HD/VHDCI, 16.40 ft/5 m NOTE: External Cable only. 68-pin HD/VHDCI, 12 ft/3.66 m NOTE: External Cable only.

328215-001 328215-002

Kit Contents
Model DLT VS160 Internal Kit Contents Description One Internal Drive, HP StorageWorks Tape CD-ROM (contains links to HP StorageWorks Library and Tape Tools utilities, user manuals and Windows drivers),Data Cartridge, Warranty Documentation, Media Documentation, HP Data Protector Express Single Server Edition backup software and HP Data Protector Express Bare Metal Disaster Recovery option on CD-ROM, 1 ribbon cable, self-terminated. *NOTE: 0D1 will appear after this part number on your sales order if factory NOTE: integration into a server or rack-mount kit is indicated One External Drive, HP StorageWorks Tape CD-ROM (contains links to HP DLT VS160 External StorageWorks Library and Tape Tools utilities, user manuals and Windows drivers),Data Cartridge, Warranty Documentation, Media Documentation, HP Data Protector Express Single Server Edition backup software on and HP Data Protector Express Bare Metal Disaster Recovery option CD-ROM, 1 Ultra3/Ultra160 compliant SCSI cable, 68 VHDCI TO 68-PIN,HD, 2.5M, 1 terminator, 1 power cord. DLT VS160 External (Int'l) One External Drive, HP StorageWorks Tape CD-ROM (contains links to HP StorageWorks Library and Tape Tools utilities, user manuals and Windows drivers), Data Cartridge, Warranty Documentation, Media Documentation, HP Data Protector Single Server Edition backup software and HP Data Protector Express Bare Metal Disaster Recovery option on CD-ROM, 1 Ultra3/Ultra160 compliant SCSI cable, 68 VHDCI TO 68-PIN,HD, 2.5M, 1 terminator. Part Number A7569B*

A7570B

A7571B

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Technical Specifications
Dimensions Form Factor Physical (H x W x D) Internal Physical (H x W x D) External Shipping (H x W x D) Internal Shipping (H x W x D) External Out of box Internal Out of box External Shipping Internal Shipping External Native Compressed (assumes 2:1 data compression) Buffer Size Sustained Transfer Rate (native) Sustained Transfer Rate (with 2:1 data compression) Burst Transfer Rate Data Access Time Average Load Time Average Unload Time MTBF Uncorrected Error Rate
DLT VS160 Tape Drive inches half-height 1.656 x 5.807 x 8.7 in (4.20 x 14.75 x 22.2 cm) 2.61 x 8.3 x 10.73 in (6.63 x 21 x 21 x 27.25 cm) 12.75 x 9.38 x 6.38 in (32.69 x 23.83 x 16.21 cm) 14.75 x 12.50 x 7.12 in (37.47 x 31.75 x 18.09 cm) 3.0 lb (1.36 kg) 8.00 lb (3.63 kg) 6 lb (2.72 kg) 12.25 lb (5.56 kg) 80 GB 160 GB

Weight

Capacity

Performance

16 MB 8 MB/s 16 MB/s
Reliability Media Compatibility
160 MB/s (Synchronous) 90 s 120 s 25 s 250,000 hours at 100% duty cycle 1x1017 bits read DLT VS 1 VS80 and DLT 1 formatted DLTtape IV - read only 240 tracks DLZ PRML Wide Ultra III SCSI-2 (LVD) Internal: one 68-pin HD External: two 68-pin HD +5V, +12V 15 Watts (average read/write operation)

Tape Format

Interface
Recording Format Data Compression Data Encoding Method SCSI Interface SCSI Connector Power Requirements Power Consumption

Power Specifications

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Environmental Specifications Temperature Non-Condensing Humidity Drive LED Indicators External Power Drive Error Ready
50 to 104 F (10 to 40 C) Operating 40 to 150.8 F (-40 to 66 C) Storage 20% to 80% Operating 10% to 95% Storage Drive has detected an unrecoverable error condition Power on/off or tape is in motion Drive has detected an error but does not indicate an unrecoverable error
Copyright 2008 Hewlett-Packard Development Company, L.P. The information contained herein is subject to change without notice. Microsoft and Windows NT are US registered trademarks of Microsoft Corporation. Intel is a US registered trademark of Intel Corporation. Unix is a registered trademark of The Open Group. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. For tape drives and media, 1 GB = 1 billion bytes. Actual formatted capacity is less.

HP StorageWorks DLT VS160 Tape Drives

User Guide

Installation, Operating and Troubleshooting information for DLT VS160 tape drives
Part number: A7569-90901 First edition: September 2005
Legal and notice information Copyright 2005 Hewlett-Packard Development Company, L.P. Hewlett-Packard Company makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material. This document contains proprietary information, which is protected by copyright. No part of this document may be photocopied, reproduced, or translated into another language without the prior written consent of Hewlett-Packard. The information is provided as is without warranty of any kind and is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. Microsoft, Windows, Windows NT, and Windows XP are U.S. registered trademarks of Microsoft Corporation. UNIX is a registered trademark of The Open Group. DLTtape, the DLTtape logo, Super DLTtape and the Super DLTtape logo are trademarks of Quantum Corporation registered in the U.S.A. and other countries.
HP StorageWorks DLT VS160 Tape Drives User Guide

Contents

About this guide. Contents. 7.
Related documentation. Registering your tape drive. HP technical support. HP-authorized reseller. Helpful web sites.. 8

Before you start. 9

Which operating systems are supported?. How do I connect the drive to my server?. Internal drives. External drives:. Why is the SCSI bus type important?. How can I check the SCSI bus type and SCSI ID?. Using the HP StorageWorks Tape CD-ROM. Usage models. Other usage models. Install drivers. Installing on Windows. Installing on UNIX. Installing on IA64. Upgrade backup software... 9. 10. 10. 10. 10. 11. 11. 12. 13
Drivers and backup software. 15

... 15

Installing an internal DLT VS160 tape drive. 17
Mounting bay. Air flow requirements. Check the drives SCSI ID. Prepare mounting bay. Attach mounting hardware. HP ProLiant servers. Other servers. Install drive. Orientation. Attach power and SCSI cables. Where should the SCSI terminator be?. Secure the drive. Mounting hardware used (HP ProLiant). No mounting hardware used. 26 27
Installing an external DLT VS160 tape drive. 29
Check the drives SCSI ID. Connect the SCSI cable. Why does the tape drive need a terminator?. Connect the power cable.. 31 32
Verify installation. 33 Operating your tape drive. 35
Front panel. Front panel LEDs. Eject button. Loading and unloading. Inserting cartridges. Removing cartridges. Removing power from the drive. Understanding LEDs. At power on. Troublehooting the LEDs. Unload/Eject Button Functions. Emergency Reset. Enter Code Update Mode. Data cartridges. Write-protecting cartridges. Cleaning cartridges. Caring for cartridges. Diagnostic tools. Troubleshooting with Library & Tape Tools. Performance Assessment Tools. Optimizing performance. Is the tape drive on a dedicated SCSI bus?. Can your system deliver the required performance?. 45
Use the correct media. 43
Diagnostic Tools and Performance. 47

Troubleshooting. 51

General Procedure. Has the system just been installed?. Are you using the correct media?. Has the drive been moved recently?. Has the operating system or backup software changed?. 52
To disconnect your drive. 53 To reconnect your tape drive. 53
Replacing an internal tape drive. 53
SCSI configuration guide. 55
SCSI in HP StorageWorks DLT VS160 devices. Daisy chaining devices. SCSI terminology. Setting up the SCSI bus. SCSI ID numbers. Identifying SCSI IDs. Setting the SCSI ID on HP StorageWorks DLT VS160 drives. SCSI termination. Internal drives. External drives. SCSI cables. Cable length. Cable quality. Note on SE and LVD interfaces. 60 60

About this guide

This guide provides information about: Installing the HP StorageWorks DLT VS160 tape drive Using the HP StorageWorks DLT VS160 tape drive Troubleshooting the HP StorageWorks DLT VS160 tape drive

Related documentation

In addition to this guide, please refer to other documents for this product: Start here poster for an overview of the installation information in this guide (available in English, French, German and Japanese) UNIX Configuration Guide (available in English) These and other HP documents can be found on the HP documents web site: http://www.docs.hp.com.

For a detailed product specification, please refer to our World Wide Web site (www.hp.com).
Figure 1 Front view of tape drive
Cartridge slot Power LED (external drives only) Ready LED Fault LED Clean LED Media LED Eject button
Which operating systems are supported?
HP StorageWorks DLT VS160 drives can be connected to servers running under Windows, NetWare, HP-UX, Linux and other major operating systems. Refer to the HP StorageWorks Tape Software Compatibility topic on our World Wide Web site (www.hp.com/go/connect) for the most recent information about the operating system versions that are supported.
HP StorageWorks DLT VS160 Tape Drives User Guide 9
How do I connect the drive to my server?
The following guidelines apply: You will need a properly installed and configured SCSI host bus adapter (HBA) or a built-in SCSI controller on your server and a suitably-rated SCSI cable. For optimum performance your tape drive should only be connected to an Ultra 160 or Ultra 320 host bus adapter or SCSI controller. See also Why is the SCSI bus type important? on page 10. For optimum performance the drive should be the only device on the SCSI bus. Do not connect more than two tape drives per SCSI controller. Always terminate the SCSI bus. Do not attach the drive to the same SCSI bus as your disk drive or to a RAID controller (unless you are connecting to a ProLiant server with a Smart Array 6i RAID controller).

Internal drives

The tape drive is installed into a spare drive bay in your server (or into an HP Rack-Mount Option Kit) and is attached to the SCSI bus of the host server. Use an LVDS-compatible ribbon cable to connect the tape drive to a spare 68-pin, high density (HD), wide SCSI connector on the host server. For most servers we recommend that you use the terminated SCSI ribbon cable supplied with the drive. You need one industry-standard, 5-inch, half-height bay in which to install the HP StorageWorks DLT VS160 tape drive. See also Installing an internal DLT VS160 tape drive on page 17.

External drives:

Your tape drive is supplied with a 68-pin, wide, VHDCI-to-HD SCSI cable to attach to the host server. See also Installing an external DLT VS160 tape drive on page 29. Check the usage models on Usage models on page 12. This shows how the HP StorageWorks DLT VS160 tape drive can be used in different system architectures.
Why is the SCSI bus type important?
The SCSI bus type determines the speed at which data can be transferred between devices on the bus and the maximum length of cable that can be used. The drives support a burst transfer rate of 160 MB/sec. To benefit from this level of performance, it is important to ensure that the drives are connected to a SCSI bus of a similar or higher specification. This means that you need: An Ultra160 or Ultra320 SCSI bus. Ultra160 SCSI supports the maximum bus speed of 160 MB per second; Ultra320 SCSI exceeds this. LVD-rated SCSI cabling and terminators. The LVD interface enables the data to be transferred at the drive's maximum rate and provide a maximum cable length of 12 meters.

Other usage models

The tape drive may work with other usage models, such as network attach storage (NAS) and storage area networks (SAN), but HP does not currently provide technical support for installing and using stand-alone DLT VS160 tape drives with these architectures. Similarly, connection to fibre channel may be possible, if you purchase and install a fibre channel/SCSI bridge, but it is not currently a supported option. Please check www.hp.com/go/connect for the latest supported configurations.
Drivers and backup software

Install drivers

Installing on Windows
The driver available from Microsoft update is acceptable, but the HP driver provides better support for all the features of your new tape drive. It is regularly updated and is available on the HP StorageWorks CD-ROM or on the HP Support web site at www.hp.com/support. Refer to the accompanying README file for specific installation instructions for Windows 2000, Windows XP and Windows Server 2003 drivers. NOTE: We recommend that you install drivers from the web link on the CD-ROM rather than the Windows Hardware Installation Wizard, because you can also use HP Library & Tape Tools software on the CD-ROM to verify that your installation is correct (see Troubleshooting with Library & Tape Tools on page 47). If you do not have internet access, you can also install drivers directly from the HP StorageWorks Tape CD-ROM, but these may not be the latest versions available.

Installing on UNIX

The recommended backup applications use the operating systems standard, built-in device drivers. To upgrade drivers we recommend that you patch to the latest version of the operating system or configure device files.

Installing on IA64

If you are installing on an IA64 system, such as an HP Integrity server, check www.hp.com/go/connect for the latest information on the availability of backup application upgrades and drivers.

Upgrade backup software

It is important to check www.hp.com/go/connect for software compatibility and install any recommended upgrades. For optimum performance it is important to use a backup application that is appropriate for your systems configuration. In a direct attach configuration, where the tape drive is attached to a standalone server, you can use backup software that is designed for a single server environment. In network configurations you will need backup software that supports enterprise environments. HP, Veritas, Legato, Yosemite and Computer Associates all provide suitable products. Further details about these and other products that may be appropriate can be found on our connectivity web site.

CAUTION: Static electricity can damage electronic components. Always wear an antistatic wriststrap if possible. If not, to equalize the electromagnetic charges, touch a bare metal part of the server (such as the back plate) before you remove the tape drive from its bag. Figure 3 Checking the SCSI ID
1. Determine whether you need to change the SCSI ID from the default of 6. For most operating systems you can run HP Library & Tape Tools to check your servers current SCSI configuration (see Diagnostic tools on page 47). This will provide information about the SCSI bus and the SCSI IDs in use. See also Troubleshooting with Library & Tape Tools on page 47. 2. Change the tape drives SCSI ID, if necessary. The SCSI ID is set using jumpers on a set of pins at the rear of the drive, as shown in Figure 3. Use tweezers or small pliers to move the jumpers to the pattern corresponding to the ID you want. Spare jumpers are provided with the drive.

Prepare mounting bay

WARNING! To avoid personal injury or damage to the server or tape drive, ensure that the server is disconnected from the mains power supply while you install the drive.
CAUTION: Static electricity can damage electronic components. Always wear an antistatic wriststrap if one is available. If not, after you have disconnected power from the server and removed the cover, touch a bare metal part of the chassis. Similarly, touch a bare metal part of the drive before installing it. 1. Assemble the necessary tools and materials: Phillips screwdriver Flat-bladed screwdriver (if your server uses slotted screws) Torx screwdriver (if your server uses torx screws) Your server manuals (for reference during installation) 2. Perform a normal system shutdown and turn off the server and any connected peripherals. 3. Remove the cover and front panel from the server, as detailed in your servers documentation. As you work inside the server, you may have to disconnect other signal cables or power cables from other devices to maneuver the new drive into place. If you have to do this, make a note of their position and connections so you can put them back correctly later. Figure 4 Removing cover from typical ProLiant server

Figure 5 Removing cover from typical AlphaServer
4. Remove the filler panel from a spare 5-inch bay of your server, as described in your servers documentation. With some servers, such as the HP AlphaServer ES40, you must also remove the half-height device divider. 5. You are now ready to install your tape drive.

Attach mounting hardware

If your server requires special rails or other hardware to install the tape drive, mount them on the tape drive now. If your server does not require special mounting hardware, proceed to Install drive on page 23 now.

HP ProLiant servers

NOTE: If mounting hardware is supplied with your tape drive, it may not be exactly the same as shown in the illustrations. Different models of server require different mounting methods. The server may also incorporate a locking mechanism to hold the tape drive in place. See Secure the drive on page 26. Please check your HP ProLiant server documentation to ascertain the correct method of mounting, and to check whether mounting hardware is provided with the server.

Mounting rails

Some HP ProLiant servers, such as ML530 and ML570, require mounting rails. These may be metal or plastic rails attached to the server's drive bay filler panel. Use a regular Phillips screwdriver to attach the appropriate rails. Use the M3 screws provided with the tape drive as shown in Figure 6. Figure 6 Attaching mounting rails in a typical HP ProLiant 530 or 570
Ensure you do use the M3 screws provided. The rails may be attached to the filler panel by screws of a different thread/size type and these should not be used. If in doubt, refer to your HP ProLiant server documentation.

Mounting screws

Other HP ProLiant server models, such as ML350 and ML370, only require the use of special locating screws with no mounting rail. Use a T8 Torx screwdriver to attach the appropriate screws. You may need to purchase the M3 screws separately. Position the screws, as shown in Figure 7.
Figure 7 Attaching locating screws in a typical HP ProLiant 350 or 370
M3 mounting screws for use with HP ProLiant ML350. These screws have a thicker head than the general mounting screws. M3 offset mounting screws for use with HP ProLiant ML370. These screws have a thick offset piece and a thicker head than the general mounting screws.

Other servers

1. Attach the appropriate mounting hardware. Refer to the manufacturers documentation for instructions. If you are installing on a server that requires a tray, place the tape drive in the tray. Some servers have snap-on mounting rails attached to the filler panel. These can be removed and attached to the tape drive with screws.

Install drive

1. Slide the tape drive into the open bay, aligning the tray or rails with the slots in the bay, as shown in Figure 8. Figure 8 Installing tape drive
If your server does not use mounting hardware, check that the holes in the chassis are aligned with the holes in the side of the tape drive. Do not secure the drive at this point because you may have to move the drive to get the cables into place.

Orientation

The internal tape drive may be installed top side up, left side down or right side down. Do not install it upside down. Check your server documentation to find out which orientations it supports.
Attach power and SCSI cables
To support the high performance of the tape drive it is important that you connect to a recommended SCSI bus and use a suitably-rated SCSI cable, see Why is the SCSI bus type important? on page 10. Electrical specifications are as follows. Power consumption Power requirements 15 Watts (average read/write operation) +5V @ 2.1A typical, +5V @ 2.1A maximum +12V @ 0.7A typical, +12V @ 2.7A maximum
1. Check your server or HBA documentation to ensure that the SCSI bus and cabling supports up to Ultra160 bus speeds. We recommend that you attach the SCSI ribbon cable supplied with the tape drive to the SCSI host bus adapter. 2. Attach a spare power cable from the server's internal power supply to the power connector, as shown in Figure 9. 3. Attach a spare connector on the server's built-in SCSI bus or HBAs SCSI ribbon cable to the SCSI connector of the drive, as shown in Figure 9. 4. If the drive is the last device on the SCSI chain, make sure that the SCSI cable is terminated correctly. (The cable supplied with the tape drive is terminated correctly.)

Capacity Compatibility

Type of cartridge DLTtape IV DLTtape IV

160 GB* 80 GB*

read/write read only
(DLT1/VS80 format) All other cartridges Not compatible. The drive ejects degaussed or cartridges written in any of the following types: DLT III, DLT IIIXT, DLT IV (except for cartridges written in VS80 format), SDLT I and SDLT II * Capacity assumes 2:1 compression. If your cartridge is ejected within a minute after loading, you have used the wrong media format or the cartridge is damaged.
Write-protecting cartridges
If you want to protect the data on a cartridge from being altered or overwritten, you can write-protect the cartridge. Figure 18 Write protecting a cartridge
Write-protect icon locked = cartridge write-protected, unlocked = cartridge write-enabled, Write-protect switch switch to left = cartridge write-enabled switch to right = cartridge write-protected
If you move the write-protect switch during operation, the write-protect feature does not take effect until after the current write operation completes. To write-protect a cartridge, slide the switch to the right. A locked icon appears on the switch, indicating that the cartridge is protected. To write-enable a cartridge, slide the switch to the left. The unlocked icon appears on the switch.
The indicator on the top of the data cartridge also points to the appropriate icon, indicating the write-protected status. Figure 18 illustrates the location of the write-protect switch and indicator. Write-protection will not prevent a cartridge being erased by bulk-erasure or degaussing.

Cleaning cartridges

You must use DLT VS160 CleaningTape with HP StorageWorks DLT VS160 tape drives. Most other cleaning cartridges, such as CleaningTape III, will be ejected. CAUTION: Do not use other format cartridges in your tape drive and do not use DLT VS160 CleaningTape cartridges in other format tape drives.

To clean the tape drive:

A DLT VS160 CleaningTape cartridge should only be used when the Clean LED is constantly lit or when your backup software notifies you that the tape drive needs cleaning. Do not clean the tape drive unless the tape drive specifically indicates cleaning is necessary. For ordering information see www.hp.com/go/storagemedia. 1. Insert the DLTVS160 CleaningTape cartridge, with the Front Slide Label Slot facing outward. 2. The drive will carry out its cleaning cycle and eject the cartridge on completion, which can take between 1 (the first time that the cartridge is used) and 10 minutes (the 20th time that the cartridge is used). During the cleaning cycle the Clean LED will blink rapidly. 3. Each DLT VS160 CleaningTape cartridge can be used up to 20 times. The cleaning cartridge includes a label with 20 small boxes printed on it. Place a check mark in one of the boxes each time you use the cleaning cartridge to clean the drive. Replace the cleaning cartridge when you have checked all the boxes. If the cartridge has expired, it will not clean; it does not eject.

Performance Assessment Tools
NOTE: We strongly recommend that you check the information on our web site at www.hp.com/support/pat. This contains detailed support information that will enable you to identify bottlenecks and take full advantage of the performance capabilities of the DLT VS160 tape drive. You can use our free, standalone performance assessment tools to check tape performance and test whether your disk subsystem can supply data at the maximum transfer rate. The tools are located online at www.hp.com/support/pat. They are also integrated into HP Library & Tape Tools, which is available both online (www.hp.com/support/tapetools) and on the CD-ROM supplied with your tape drive.

Optimizing performance

Various factors can affect tape drive performance, particularly in a network environment or if the drive is not on a dedicated bus. In nearly all cases when performance is not as expected, it is the data rates of the disk subsystem that cause the bottleneck. If your tape drive is not performing as well as expectedfor example, if backup windows are longer than expectedplease try the tools and consider the following points before contacting HP Support at www.hp.com/support.
Is the tape drive on a dedicated SCSI bus?
We recommend that the tape drive is the only device on the SCSI bus. If it is not, ensure other devices are LVD-compliant. If they are single-ended, the bus will switch to single-ended mode with a lower transfer speed. There will also be restrictions on cable length.
Can your system deliver the required performance?
The HP StorageWorks DLT VS160 tape drive supports a burst transfer rate of 160 MB/s and can write uncompressed data at up to 8 MB/s (28.8 GB/hour) or compressed data at up to 16 MB/s (57.6 GB/hour), assuming 2:1 compression. However, to get this performance it is essential that your whole system can deliver this performance. In most cases, the backup application will provide details of the average time taken at the end of the backup. Typical areas where bottlenecks can occur are: Disk subsystem A single spindle disk may not be able to deliver good data throughput at poor compression ratios. Best practice to ensure good throughput is to utilize multiple disk spindles or data sources. System architecture Be aware of the architecture of your data protection environment; the aggregation of multiple client sources over a network provides a good way of delivering good performance, but anything less than Gigabit Ethernet may limit performance. Some enterprise class backup applications can be made to interleave data from multiple sources, such as clients or disks, to keep the tape drive working at optimum performance.

Are you using the correct media?
Are you using new cartridges or a different brand of cartridge? Have you been using the particular cartridge for a very long time? The problem could lie with the cartridge: 1. Check through the media chapter on page 43. 2. Check that you are using a DLTtape VSI cartridge. 3. Has the cartridge been write-protected, see Write-protecting cartridges on page 44? 4. Clean the tape heads with the cleaning cartridge, see Cleaning cartridges on page 45. 5. Has the cartridge been dropped? It is probably damaged. Discard it and use a new cartridge. 6. Try the operation again. 7. If the problem still occurs, try using a known-good cartridge. 8. If the problem is still there, the problem probably lies with the drive or the host server.
Has the drive been moved recently?
Have any cables been disconnected and reconnected? Has the environment changedunusually hot, cold, damp or dry? Has there been dust or dirt near the drive. Have reasonable precautions against static been taken? The problem could lie with the drive: 1. Check the cables and connectors. 2. Clean the tape heads with the cleaning cartridge. 3. If the problem persists, check the environmental conditions against the specified limits, see table above or refer to www.hp.com. Perhaps move the drive to a more suitable site.
Has the operating system or backup software changed?
Has a new operating system been installed in the host server? Has new backup software been installed? The problem could lie with the host or the software. Consult the servers operating manuals, the software manual, or seek help from a service engineer.
10 Replacing an internal tape drive
If your tape drive proves to be faulty and cannot be repaired and it is still covered by the original warranty, it will be replaced.

To disconnect your drive

1. Unpack your replacement drive, and retain the packaging. 2. Power off the server and disconnect from the mains power supply. 3. Remove the cover from the server. 4. Observing normal anti-static precautions (see page 20) remove any screws that are holding the tape drive in place. 5. Disconnect the drive from the servers power and SCSI cables and slide it carefully out of the mounting bay. 6. Put the drive into the packaging that contained the replacement drive. 7. Return the faulty drive to your local HP Service Center. Instructions on where to return faulty drives will be shipped with the replacement drive. NOTE: If you are not replacing the drive immediately, you should insert a blanking plate into the empty bay. Replace the cover on the server and secure with screws, as appropriate.

SCSI terminology

SCSI is a bus interface; all the devices are connected to a single cable (some of this may be inside and some outside the host server's case). The connection to the host itself is known as the Host Bus Adapter (HBA). You can have several HBAs in a single server, each with its own SCSI bus: this is a common arrangement in high-performance servers. Some host bus adapters (such as the LSI Logic LSI22320-R) have more than one SCSI bus available on a single card. Various terms are used when describing SCSI devices. These terms relate to the factors that affect performance and cable length: The speed of the data bus, which may be Fast, Ultra, Ultra2, Ultra3, Ultra160 or Ultra320. The width of the data bus, which may be Narrow or Wide (8-Bit or 16-Bit).
The voltage level of the interface, which may be single-ended (SE) or low voltage differential (LVD).

Setting up the SCSI bus

Each device on a SCSI bus, including the SCSI host bus adapter (HBA), must be configured with a unique ID (identifier). The SCSI bus must be terminated. NOTE: HP recommends that a dedicated host bus adapter is used for the tape drive. A suitable adapter is available from HP as an accessory (see www.hp.com/go/connect).

SCSI ID numbers

For wide SCSI buses, the SCSI ID will be a number from 0 through 15, so a typical wide SCSI HBA can accommodate up to fifteen other devices. (On narrow SCSI buses, the SCSI ID is a number from 0 through 7.)
Each device must have a unique SCSI ID. The drive can be assigned any unused ID between 0 and 15. Do not use SCSI ID 7, which is reserved for the SCSI controller. SCSI ID 0 is typically assigned to the boot disk and should also not be used unless the tape drive is on a dedicated SCSI bus. SCSI ID 7 is normally reserved for the HBA because it has the highest priority on the bus. On wide buses, the priority runs from 7 (highest) to 0, then 15 down to 8 (lowest). NOTE: As a general rule, avoid putting tape devices on the same bus as any hard disks.

Identifying SCSI IDs

If your server already has devices connected to the SCSI bus, you will need to know their IDs to avoid any conflict with the new tape drive. Here are some methods of finding out the information: The fastest and easiest way is to run HP Library & Tape Tools from the HP StorageWorks CD-ROM. HP Library & Tape Tools will check your SCSI configuration, including the SCSI controller itself and any devices currently attached to it. Most servers display a list of SCSI devices and IDs during the boot-up process. This usually scrolls past very fast. If you press the [Pause] key, you should be able to halt the scrolling and view the list. On Windows systems you can use Device Manager.

A suitably terminated LVD internal ribbon cable is supplied with the tape drive. The terminator is usually a small, rectangular block of plastic attached to the cable end and marked SCSI Terminator. Figure 19 SCSI termination in internal drives
As long as this terminator is attached, you do not need to take any further action. However, if you have other devices attached to the cable, make sure that they have termination removed or disabled. NOTE: If you have an internal and external device attached to the same SCSI bus, the HBA will be in the middle of the cable and thus its termination must be disabled. See the host bus adapter's documentation for details of how to do this.

External drives

All HP StorageWorks DLT VS160 external tape drives are supplied with the appropriate cable and multimode terminator. Make sure the terminator is firmly attached to a SCSI connector on the rear of the device when you install it. Always use the supplied multimode terminator for proper operation.
Figure 20 SCSI termination on a single tape drive
If you have more than one device on the SCSI bus, daisy chain them by connecting a cable from the SCSI-OUT connector on the first device to the SCSI-IN connector on the second device and make sure that the second device is terminated. (Always use an LVD-rated cable and an LVD-rated or multimode terminator.) Figure 21 SCSI termination in daisy-chained external drives

SCSI cables

Cables matter in SCSI systems. There are two factors to consider: cable length and cable quality.

Cable length

For LVD SCSI the maximum length for a single device is 25 meters. For multiple devices, the maximum combined internal/external length is 12 meters. If you have a combination of LVD and SE devices on the bus, the maximum cable length reverts to the SE specification. See note on SE and LVD interfaces for more information. For best performance, keep lengths to a minimum, but avoid very short overall lengths (less than 0.5 meters).

Cable quality

It is important to use good quality cables. Generally speaking, cable quality affects performance and reliability. This is particularly true for external, shielded cables. Look after your SCSI cables. In particular, take care when connecting or disconnecting not to damage the high-density connectors. Avoid putting excessive twists in external shielded cables, as this can cause premature failure.

With internal devices

For HP StorageWorks DLT VS160 internal devices, you need a SCSI ribbon cable with the correct termination. HP StorageWorks DLT VS160 tape drives have a 68-pin wide, high-density SCSI connector. A suitable cable is supplied with the tape drive. If you are using an HP StorageWorks DLT VS160 drive on an internal bus with other peripherals that run at Ultra160 speeds, it is important that a 68-pin LVD-compatible ribbon cable is used. Do not connect your tape drive to lower-rated SCSI or to narrow SCSI.

With external devices

The cable provided with all HP StorageWorks DLT VS160 external tape drives will attach to a server with a wide, very high density (VHDCI), LVDS SCSI connector. If your server or host bus adapter is equipped with a high density (HD) wide SCSI connector, you will need to order a 68-pin VHDCI-to-HD converter or 68-pin VHDCI-to-HD cable. See www.hp.com/go/connect.
Note on SE and LVD interfaces
SE and LVD define how the signals are transmitted along the cable. With single-ended (SE) SCSI, each signal travels over a single wire and each signal's value is determined by comparing the signal to a paired ground wire. Signal quality tends to decrease over longer cable lengths or at increased signal speed. With low voltage differential (LVD) signaling, signals travel along two wires and the difference in voltage between the wire pairs determines the signal value. This enables faster data rates and longer cabling with less susceptibility to noise than SE signaling and reduced power consumption.
If you use LVD SCSI devices on the same bus as single-ended devices this will switch the LVD SCSI host adapter into single-ended mode and restrict cable length. If you connect only LVD SCSI devices, the bus will operate in low voltage differential mode and the appropriate Ultra speeds will be enabled. You can use a combination of Ultra devices. Each device will operate at its optimum speed.