Tandberg Data SDLT220-320 PRODUCT, SDLT220, SDLT320 Product Manual

TANDBERG Super DLT

Product manual

TM

Revision 2 June 2002 - 432589-01

SDLT 220 andSDLT 320 Product Manual

Copyright

Copyright © 2002 by Tandberg Data.. All rights reserved.

Trademarks

Quantum, the Quantum logo, 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. Laser
Guided Magnetic Recording (LGMR) and Pivoting Optical Servo (POS) a re trademarks of
Quantum Corporation.

Other company and product names used in this document are trademarks, registeredtrademarks, or
service m arks of their re spective owners.

Legal Disclaimers

The information contained in this document is the property of Tandberg Data ASA.
Tandberg retains its copyright on the information contained herein in all cases and situations of
usage, including derivative works. The possessor agrees to safeguard this information and to
maintain it in confidence and not re-publish it in whole or in part without Tandberg’s prior written
consent.

Tandberg Data reserves the right to m ake changes and improvements to its products, without incurring
any obligation to incorporate such changes or improvements in units previously sold or shipped.

It is the responsibility of the user to carefully read and understand the User Manual statements for
Class A Equipment and Class B Equipment that appear on page iv and page v, respectively.

Contact Information

You can request publications from your Tandberg Data Sales Representative or order them
directly from Tandberg Data.

Telephone numbers and street addresses change frequently; for the latest, up-to-date contact
information, visit:

www.tandberg.com

Telephone numbers, street addresses, time zones, and other pertinent facts are listed in the

Support section of the web site.

Revision History

Revision Date (YYMMDD) Summary of Changes

422216-01 020610 Initial Release

SDLT 220 and SDLT 320 Product Manual

SDLT 220 and SDLT 320 Product Manual

User Manual Statements for Class A Equipment (Internal Tape
System)

This equipment generates, uses, and may emit radio frequencyenergy. The equipment has been
tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the
FCC rules. These limits are designed to provide reasonable protection against radio frequency
interference in a commercial installation.

Operation of this equipment in a residential area may cause interference, in which case the user at
his own expense will be required to t ake whatever m easures may be required to correct the
interference.

Any modificationsto this device—unless expressly approved by the manufacturer—can void the
user’s authority to operate this equipment under Part 15 of the FCC rules.

Note: Additional information on the need to interconnect the device with shielded (data) cables or
the need for specialdevices, such as ferrite beads on cables, is required if such means of
interferencesuppressionwas used in the qualificationtestfor the device. This informationwill vary
from device to device and needs to be obtained from the EMC (Electromagnetic Compatibility)
group or product manager.

Warning!

This is a Class A product. In a domestic environment this product may cause radio interference in
whichcasetheusermayberequiredtotakeadequatemeasures.

Achtung!

Dieses ist ein Gerät der Funkstörgrenzwertklasse A. In Wohnbereichen können bei Betrieb dieses
Gerätes R undfunkstörungen auftreten, in welchen Fällen der Benutzer für entsprechende
Gegenmaßnahmen verantwortlich ist.

Warning!

This Class A digital apparatus complies with Canadian ICES-003.

Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.

Attention!

Ceci est un produit de Classe A. Dans un environnement domestique, ce produitrisque de créer des
interférencesradioélectriques, il appartiendra alors à l'utilisateur de prendre les mesures spécifiques
appropriées.

SDLT 220 and SDLT 320 Product Manual

User Manual S tatements for Class B Equipment (Tabletop Tape
System)

This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the F CC rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. Operation is s ubject to the following two
conditions: (1) This device may not cause harmful interference, a nd (2) this device must accept any
interference that may cause undesirable operation.

Any modificationsto this device—unless expressly approved by the manufacturer—can void the
user’s authority to operate this equipment under Part 15 of the FCC rules.

This equipment generates, uses, and can radiate radio frequency energy and, if not installedand
used in accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a pa rticular installation. If this
equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a c ircuit different from that to which the receiver

is connected.

• Consult the dealer or an experienced radio or TV technician for help.

Note: Additional information on the need to interconnect the device with shielded (data) cables or
the need for specialdevices, such as ferrite beads on cables, is required if such means of
interferencesuppressionwas used in the qualificationtestfor the device. This informationwill vary

SDLT 220 and SDLT 320 Product Manual

from device to device and needs to be obtained from the EMC (Electromagnetic Compatibility)
group or product manager.

This Class B digital apparatus complies with Canadian ICES-003.

Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.

Table of Contents

CHAPTER1 Introduction.............................. 1-1

Purpose and S cope..........................................1-1

Referenced Documents . . . ...................................1-2

RelatedDocuments.........................................1-2

StructureofthisManual .....................................1-2

Conventions. . . ............................................ 1-4

ForMoreInformation.......................................1-4

ReaderComments..........................................1-5

CHAPTER 2 SDLT 220/320 Product Information . . . . . . . . . . . 2-1

Overview.................................................2-1

SDLT 220/320 Product Features ...............................2-2

SDLT 220/320 Technology ...................................2-3

Laser Guided M agnetic Recording ..........................2-3

Pivoting Optical Servo . ................................... 2-4

Magneto Resistive Cluster Heads . ..........................2-4

Advanced Partial Response Maximum Likelihood ..............2-5

Advanced Metal P owder Media. . . .......................... 2-5

Positive Engagement . . ................................... 2-5

SDLT 220/320 Modular Design ............................... 2-6

Data Control M odule . . ...................................2-7

Tape Control M odule . . ................................... 2-8

TCMPCBA .........................................2-8

BasePlate...........................................2-8

CartridgeReceiver ....................................2-8

Positive Engagement Tape Leader Buckling M echanism ...... 2-9

Front Panel Module . . . ...................................2-9

Electronic Interface Module...............................2-10

Tableof Contents

SDLT Cartridge Tape Module .............................2-10

Key Differences Between the SDLT 220 and the SDLT 320 . ....... 2-11

Tandberg Data DiagnosticsTools ............................ 2-12

TapeAlert................................................2-13

CHAPTER3 DriveSpecifications....................... 3-1

Product Specifications....................................... 3-1

Interface Type ..........................................3-2

Physical Dimensions . . ...................................3-2

StorageCapacity ........................................3-3

Compression............................................3-3

DataIntegrity...........................................3-4

MaximumDataTransferRate.............................. 3-5

Reliability (MTBF) . . . ...................................3-6

Load and Unload Cycles ..................................3-6

Functional Specifications . ................................... 3-6

SDLT 220/320 Performance Data . ..........................3-7

Shock and Vibration Specifications ..........................3-8

CurrentandPowerRequirements .......................... 3-10

Tape System Recording Method . . .........................3-12

Environmental Specifications ................................3-13

AirFlowRequirements..................................3-13

Temperature and Humidity ...............................3-14

Storage and Shipment. . ..................................3-14

Altitude...............................................3-15

ParticulateContaminationLimits ..........................3-15

Recording Media Specifications ..............................3-15

Backward-Read Compatibility Transfer Rates ................ 3-17

CHAPTER 4 Installing Your Tape Drive. . . . . . . . . . . . . . . . . . . 4-1

Safety, Handling, and ESD Protection .......................... 4-2

Safety Precautions .......................................4-2

Handling. . . ............................................4-3

Electrostatic Discharge Protection. ..........................4-4

Pre-Installation Guidelines ...................................4-5

Configuring and Installing an Internal Tape Drive ................. 4-6

Setting the Internal Drive SCSI ID ..........................4-7

Configuring the Internal Dr ive for TERMPWR ...............4-10

Configuring the Internal Dr ive for Narrow SCSI .............. 4-10

Table of Contents

InstallingtheInternalTapeDrive...........................4-10

SecuringtheInternalTapeDrive........................4-11

Connecting the Internal Drive Cables.....................4-12

Configuring and Installing a Tabletop Drive.....................4-20

Configuring the Drive . ..................................4-20

InstallingtheTabletopDrive..............................4-21

SCSICables........................................4-21

ACPowerCable.....................................4-22

ConfirmingtheInstallation..................................4-23

CHAPTER5 UsingYourTapeDrive..................... 5-1

PowerOnSelfTest.........................................5-2

PerformingaTrialBack-up...................................5-2

Overwriting 320-Formatted Cartridges in a 220 Drive.............. 5-3

Updating the Firmware . . . ...................................5-4

Update the Firmware Using the SCSI Bus.....................5-4

MakingaFUP/CUPTape .................................5-5

UsingaCUP/FUPTape................................... 5-5

Troubleshooting the Firmware (Code) Update .................5-6

Cleaning the Tape Mechanism ................................5-7

OccasionalCleaningofTapeHead..........................5-7

WhentoUsetheCleaningTape.............................5-8

Life Expectancy of the Cleaning Tape........................5-8

Compatibility of the Cleaning Tape..........................5-8

Loading the C leaning Tape Into a Tabletop Drive............... 5-9

Front Panel Controls and LEDs...............................5-10

Troubleshooting ...........................................5-13

POST Troubleshooting. ..................................5-13

Over Temperature Condition ..............................5-15

CHAPTER6 SCSIDescription......................... 6-1

SCSIOverview............................................ 6-1

SCSI-2Commands.........................................6-3

SCSI-3Commands.........................................6-5

Parity....................................................6-6

Signal States . . ............................................6-6

Signal Values ...........................................6-6

SCSIIDs...............................................6-8

SCSI Signals . . ............................................6-8

Tableof Contents

SCSI Signal De finitions...................................6-9

Signal Bus Timing ......................................6-10

CHAPTER7 RegulatoryCompliance.................... 7-1

Safety Regulations..........................................7-1

Safety Certifications. . . ................................... 7-1

SafetyRequirements .....................................7-2

Electromagnetic Field Specifications . ..........................7-2

Electromagnetic Emissions ................................7-2

Electromagnetic Interference Susceptibility . . ................. 7-3

Conducted Emissions. . ...................................7-3

Radiated Emissions . . . ...................................7-4

Susceptibility and ESD Limits..............................7-5

Acoustic Noise Emissions. ...................................7-6

APPENDIXA SDLTITapeCartridge.....................A-1

Tape Cartridge Handling Guidelines. . ..........................A-2

Tape Cartridge Inspection Procedure . ..........................A-3

Tape Cartridge Write-Protect Switch . ..........................A-5

Loading a Tape Cartridge . ...................................A-7

Unloading a Tape Cartridge...................................A-8

Overwriting 320-Formatted SDLT Tape Cartridges ................A-8

APPENDIXB DLTIVTapeCartridge.....................B-1

Tape Cartridge Handling Guidelines. . ..........................B-2

Tape Cartridge Inspection Procedure . ..........................B-3

Tape Cartridge Write-Protect Switch . ..........................B-7

Loading a Tape Cartridge . ...................................B-8

Unloading a Tape Cartridge...................................B-9

Glossary

List of T ables

CHAPTER1 Introduction.............................. 1-1

Table 1-1. Typographical Conventions .................................................1-4

CHAPTER2 SDLT220/320ProductInformation........... 2-1

Table2-1.AComparisonofSDLT220andSDLT320Features............................2-11

CHAPTER3 DriveSpecifications....................... 3-1

Table 3-1. SDLT 220/320 Physical Dimensions and Shipping Weight.........................3-2

Table 3-2. SDLT 220/320 Storage Capacity . ............................................3-3

Table3-3.DataTransferErrorRates...................................................3-4

Table3-4.MaximumDataTransferRates...............................................3-5

Table3-5.LoadandUnloadCycles(Maximum) .........................................3-6

Table 3-6. S DLT 220/320 Performance Data ............................................3-7

Table3-7.Non-OperatingShockSpecifications(Unpackaged)..............................3-8

Table3-8.Non-OperatingShockSpecifications(Packaged,Drop)...........................3-8

Table3-9.Non-OperatingVibrationSpecifications .......................................3-9

Table3-10.OperatingShockandVibrationSpecifications.................................3-10

Table3-11.CurrentandPowerSpecifications ..........................................3-11

Table3-12.TemperatureandHumiditySpecification.....................................3-14

Table3-13.DriveStorageandShipmentSpecifications...................................3-14

Table3-14.ParticulateContaminationLimits...........................................3-15

Table3-15.SuperDLTtapeIMediaSpecifications ......................................3-16

Table3-16.DLTtapeMediaOperatingandStorageLimits ................................3-16

Table3-17.Backward-ReadCompatibility(BRC)TransferRates...........................3-17

List of T ables

CHAPTER4 InstallingYourTapeDrive .................. 4-1

Table4-1.SCSIIDAddressSelections.................................................4-9

Table 4-2. MSE and SE Mode SCSI Connector Pin Assignments . ..........................4-14

Table4-3.MSELVDModeSCSIConnectorPinAssignments.............................4-16

Table 4-4. HVD Mode SCSI Connector Pin Assignments . . ...............................4-17

Table4-5.4-PinPowerConnectorPinAssignments......................................4-19

Table4-6.8-PinLoaderConnectorPinAssignments.....................................4-19

CHAPTER5 UsingYourTapeDrive..................... 5-1

Table5-1.IndicatorPatternDuringPOST...............................................5-2

Table5-2.BehavioroftheAmberLEDWhenaTapeCartridgeisLoaded....................5-10

Table5-3.FrontPanelLED/ControlFunctionality.......................................5-12

Table 5-4. TroubleshootingChart ....................................................5-13

CHAPTER6 SCSIDescription ......................... 6-1

Table6-1.ImplementedANSISCSI-2Commands........................................6-3

Table6-2.ImplementedANSISCSI-3Commands........................................6-5

Table6-3.ANSISignalSources ......................................................6-7

Table6-4.SCSI-2BusSignalDefinitions...............................................6-9

Table6-5.SCSIBusTimingValues ..................................................6-10

CHAPTER7 RegulatoryCompliance .................... 7-1

Table7-1.EMIRegulationsandCertifications...........................................7-3

Table 7-2. Conducted Emissions ......................................................7-3

Table7-3.RadiatedEmissions........................................................7-4

Table 7-4. Radiated, Magnetic Radiated, and Conducted Susceptibility. . . .....................7-5

Table7-5.ElectrostaticDischarge(ESD)FailureLevelLimits..............................7-5

Table7-6.AcousticNoiseEmissions,Nominal ..........................................7-6

APPENDIX A SDLT I Tape Cartridge . . . . . . . . . . . . . . . . . . . . . A-1

TableA-1.Write-ProtectSwitchPositions .............................................A-6

APPENDIX B DLT IV Tape Cartridge . . . . . . . . . . . . . . . . . . . . . B-1

List of Figures

CHAPTER1 Introduction.............................. 1-1

CHAPTER2 SDLT220/320ProductInformation........... 2-1

Figure 2-1. SDLT 220/320 Drive System (Photographs). . . ................................2-3

Figure 2-2. SDLT 220/320 Drive System (CAD Diagram in Perspective) .....................2-4

Figure 2-3. SDLT 220/320 Modular Design. ............................................2-6

CHAPTER3 DriveSpecifications....................... 3-1

CHAPTER 4 Installing Your Tape Drive . . . . . . . . . . . . . . . . . . 4-1

Figure 4-1. Connectors on the Back Panel . . ............................................4-8

Figure 4-2. Back Panel Connector Locations (Drawn to Scale). . . ...........................4-8

Figure4-3. TERMPWRConnector..................................................4-10

Figure 4-4. SDLT 220/320 — Two Views (Front + Side + Top and Back + Side + Top) .........4-11

Figure4-5. InternalDriveMountingLocations–SideandBottomViews....................4-12

Figure 4-6. Connectors on the Back Panel (Drawn to Scale)...............................4-14

Figure4-7. BackPaneloftheTabletopModel..........................................4-20

Figure 4-8. AC Power Cord Connector Types ..........................................4-23

CHAPTER5 UsingYourTapeDrive..................... 5-1

Figure5-1. SDLT220andSDLT320FrontPanels(AComparison) ........................5-11

CHAPTER6 SCSIDescription......................... 6-1

List of Figures

CHAPTER7 RegulatoryCompliance.................... 7-1

APPENDIXA SDLTITapeCartridge.....................A-1

FigureA-1. EndViewofSDLTICartridge............................................A-4

FigureA-2. BottomViewofSDLTICartridge......................................... A-4

FigureA-3. Write-ProtectSwitchonTapeCartridge.....................................A-5

FigureA-4. FrontPanelLEDs......................................................A-7

APPENDIXB DLTIVTapeCartridge.....................B-1

FigureB-1. EndViewofDLTCartridge.............................................. B-4

FigureB-2. BottomViewofDLTCartridge............................................ B-4

FigureB-3. DLTTapeLeaderLoopinitsCorrectPosition................................ B-5

FigureB-4. TapeCartridgeswithDamageVisibleDuringVisualInspection.................. B-6

FigureB-5. Write-ProtectSwitchonTapeCartridge..................................... B-7

FigureB-6. FrontPanelLEDs...................................................... B-8

CHAPTER 1 Introduction

1.1 Purpose and Scope

This product manual is a comprehensive source of information about the
SDLT 220 and SDLT 320 cartridge tape drive systems; it describes both the
internal and tabletop versions of the Super DL Ttape™tape system. This manual is
also intended to serve as an easy-to-use comprehensive information source and
product catalog to familiarize both the Tandberg Data customer base and systems
professional with the SDLT 220 and SDLT 320 cartridge tape systems,
subsequently referred to in this document as SDLT 220/320.

The SDLT 220 and SDLT 320 models have many characteristics in common,
enabling both sets of information to be presented in a single document.

NOTE: Except where clearly noted, the information in this

document applies to both models of the tape drive.

CHAPTER 1: Introduction

1.2 Referenced Documents

• Super DLT SCSI Interface Guide (432614 rev. 01 or later)

• Super DLT Design and Integration Guide (432588 rev. 01 or later)

• Super DLTtape™ Interactive Library Interface Specification

1.3 Related Documents

• DLT Script Tool User Guide

1.4 Structure of this Manual

• Chapter 1, Introduction, is the chapter you are currently reading.

• Chapter 2, SDLT 220/320 Product Information, describes various features

of the SDLT technology and the modular design used to build this exciting
product.

• Chapter 3, Drive Specifications, lists various specifications for the tape

system: product, functional, environmental, and recording media.

• Chapter 4, Installing Your Tape Drive, contains handling and pre-

installation guidelines, configuration advice, plus mounting and installation
information for your SDLT tape drive.

• Chapter 5, Using Your Tape Drive, contains information on running the self-

test, descriptions of the front panel controls and LEDs, updating the firmware
(microcode), and various pointers for caring for your SDLT tape drive.

• Chapter 6, SCSI Description, provides a high-level description of the logical

interface to the tape system.

• Chapter 7, Regulatory Compliance, describes various regulations that apply

to the SDLT tape drive.

CHAPTER 1: Introduction

• Appendix A, SDL T I Cartridge, provides tape cartridge information for the

SDLT I cartridge including handling and inspection procedures, information
on the write-protect switch, and how to load and unload a tape cartridge.

• Appendix B, DLT IV Cartridge, includes the cartridge insertion and ejection

guidelines.

• Glossary provides definitions for technical terms and acronyms that are used

throughout the document.

CHAPTER 1: Introduction

1.5 Conventions

This manual uses the following conventions to designate specific elements:

Table 1-1. Typographical Conventions

Element Convention Example

Commands

Messages Uppercase

Hexadecimal Notation

Binary Notation

Decimal Notation Number without suffix 512
Acronyms Uppercase POST

Abbreviations

Uppercase (unless case­sensitive)

Number followed by
lowercase h

Number followed by
lowercase b

Lowercase, except where
standard usage requires
uppercase

1.6 For More Information

FORMAT UNIT

INVALID PRODUCT
NUMBER

25h

101b

Mb (megabits)
MB (megabytes)

The web site http://www.superdlttape.comincludes much valuable information
about SDLT systems; or to locate very specific product-related information, visit

http://www.tandberg.com

1.7 Reader Comments

Tandberg Data is committed to providing the best products and service. We encourage
your comments, suggestions, and corrections for this manual. Please send all
comments to:

Tandberg Data ASA
P.O. Box 134 Kjelsas
N-0411 Norway

CHAPTER 1: Introduction

CHAPTER 1: Introduction

CHAPTER 2 SDLT 220/320 Product

Information

This chapter describes the features of the Tandberg Data Super DLTtape system.
This chapter covers the following topics:

• “Overview” describes basic features of the system.

• “SDLT 220/320 Product Features” lists key features of the SDLT family of

tape drives.

• “SDLT 220/320 Technology” includes photographs of the tape drive, and

introduces important basic features.

• “SDLT 220/320 Modular Design” introduces tape drive components such as

the tape heads, media, cartridge, and host interface.

• “Key Differences Between the SDL T 220 and the SDLT 320” compares

important features in the SDLT 220 and 320 products.

• “Tandberg Diagnostics Tools” describes tools and utilities that provide the

ability to run diagnostics and test for drive functionality.

• “TapeAlert” describes a built-in tape device status monitoring and messaging

utility.

2.1 Overview

The Tandberg Super DLTtape™ (SDLT) System is a highly scalable tape drive
designed for multiple product generations. It is a follow-on to the DLT product
family, which remains the industry standard for mid-range UNIX and NT system
backup and archive applications. The SDLT system comprises both the drive and
the tape cartridge; the system is available in either a built-in (internal) model or a
tabletop model. The model SDLT 220 system provides 110 GB of storage capacity
with a transfer speed of 11MB/second (native); the model SDLT 320 system

CHAPTER 2: SDLT 220/320 Product Information

provides 160 GB of storage capacity with a transfer speed of 16MB/second
(native).

To view a succinct comparison of the two models, refer to “Key Differences

Between the SDLT 220 and the SDLT 320” on page 2-11. For detailed engineering

specifications (for both the SDLT 220 and 320), refer to CHAPTER 3, “Drive

Specifications.”

2.2 SDLT 220/320 Product Features

SDLT tape drives offer the following product features:

• A streaming tape drive that uses half-inch wide Digital Linear Tape (DLT)

media.

• Standard 5.25-inch full-height form factor to simplify integration into system

and tape library solutions.

• The SDLT architecture builds on the DLT legacy by offering backward

compatibility: data backed up today using the DLT 8000, DLT 7000, DLT
4000, and DLT 1//VS80 systems will be retrievable in the future using
SDLT-based systems with DLT IV type media.

• Global Storage Link (GS Link) — An infrared (wireless) interface that

provides a wireless remote testing base allowing customers and integrators to
access system diagnostic information from the front of the tape system.

• When needed, the SDLT 320 can be operated in a mode that is completely

compatible with that of the SDLT 220.

• Handle-free load and unload feature to increase ease of use.

To see pictures of this product, refer to Figure 2-1 on page 2-3. For a complete
SDLT 220/320 feature comparison, refer to Table 2-1 on page 2-11.

The SDLT system ( Figure 2-1 and Figure 2-2) is based on Laser Guided
Magnetic Recording•••• (LGMR) technology. LGMR provides a unique
combination of the best optical and magnetic technologies, which results in
dramatically higher capacities by substantially increasing the number of recording
tracks on the data-bearing surface of the media. By recording data magnetically
on
the data-bearing side of the media and servoing optically on the backside, LGMR
optimizes highly proven technologies to deliver the most efficient, reliable and
scalable data backup solution to the mid-range market.

2.3.1 Laser Guided Magnetic Recording

2.3 SDLT 220/320 Technology

Figure 2-1. SDLT 220/320 Drive System (Photographs)

Internal drive External drive

SDLT incorporates various new state-of-the-art technologies that contribute to the
SDLT architecture. Some of these ideas are trademarked, others are patented. The
following subsections introduce the important technologies that together, comprise
the SDLT tape system.

CHAPTER 2: SDLT 220/320 Product Information

CHAPTER 2: SD LT 220/320 Pr od uc t Info rm ation

Figure 2-2. SDL T 220/320 Drive System (CAD Diagram in Perspective)

2.3.2 Pivoting Optical Servo

Pivoting Optical Servo (POS) is a optically-encoded servo system, which
combines high-density magnetic read/write data recording with laser servo
guiding. The POS is designed for high-duty-cycle applications, which
decreases cost and increases user convenience. The POS enables the head to
track dynamic variations in tape motion which provides a track count with
an order of magnitude incr eas e over cur rent DLT products.

2.3.3 Magneto Resistive Cluster Heads

Magneto Resistive Cluster (MRC) heads are a densely packed array of small, cost­effective Magneto Resistive (MR) tape heads precisely positioned using advanced
thin-film processing technology. SDLT MRC heads provide high wafer usage
efficiency resulting in low head costs, are less susceptible to temperature and
humidity, yield higher track density and capacity, and provide a multi-channel
architecture for increased transfer rate and performance.

CHAPTER 2: SDLT 220/320 Product Information

2.3.4 Advanced Partial Response Maximum
Likelihood

Improving on Partial Response Maximum Likelihood (PRML) technology,

tthe advanced PRML channel technology was developed with to bring

new levels of performance and capacity to high-performance linear tape products.
This provides high-encoding efficiency recording densities for greater capacity and
performance that enables SDLT to substantially increase transfer rates and capacity.

2.3.5 Advanced Metal Powder Media

Advanced Metal Powder (AMP) media is a state-of-the-art media using durable
metal powder technology for recording very high densities of data. The back side
of the AMP media receives a specially formulated coating to accept the optical
servo tracks. Because the servo information is on the back side of the media, the
entire data-bearing side of the media is available for recording data and eliminate
the need for pre-formatting. In addition, AMP media has been designed to meet the
needs of multiple generations of the SDLT technology.

2.3.6 Positive Engagement

Positive engagement is a highly robust tape leader-buckling mechanism that
increases cartridge life and supports the heavy duty-cycle environments found in
high-end and automation environments.

This mechanism engages the tape leaders upon cartridge load and disengages them
upon cartridge unload. It uses a solid metal pin that is attached to the drive leader
to link with molded clips that are permanently attached to the tape leader inside the
cartridge. The Positive Leader Link design makes the buckling of SDLT media a
totally reliable mechanical process.

In addition to supporting SDLT media cartridges, the buckling mechanism also
supports existing DLT IV data cartridges to ensure complete backward-read
compatibility.

CHAPTER 2: SDLT 220/320 Product Information

2.4 SDLT 220/320 Modular Design

SDLT is designed as a total system. The system includes a complex interaction of a
number of important components including such items as the tape path, tape heads,
media, cartridge, and host interface.

SDLT is organized into five distinct modules (Figure 2-3) as follows:

• Data Control Module (DCM)

• Tape Control Module (TCM)

• Front Panel Module (FPM)

• Electronic Interface Module (EIM)

• SDLT Cartridge Tape Module (CTM)

The modular concept makes the SDLT system easy to manufacture and configure.
Each module is optimized to perform a specific set of functions and designed to
interface with the other modules in a well-defined and flexible manner. The
following subsections provide a brief overview of each module.

DCM

TCM

FPM

CTM

EIM ICM

EIM HIM

Figure 2-3. SDLT 220/320 Modular De sign

NOTE: Despite the deliberate modularity of each module, with the

exception of the CTM and the FPM, individual users
should not “swap” modules. The CTM and the FPM are

the only two modules that are field replaceable. Customer
adjustments to the TCM, DCM, or EIM are not allowed,
and will void the drive’s warranty.

2.4.1 Data Control Module

The Data Control Module (DCM) contains several of the functions and features of

LGMR technology, which is at the heart of the SDLT technology. Of
the five technologies that constitute the LGMR technology, two are found in the
DCM. These are the POS and the MRC heads.

The main functions of the DCM are to provide the path and guides for all the tape
motion inside the drive and to write data to and read data from the tape. In addition
to the POS and MRC heads described in Section 2.3.2, “Pivoting Optical Servo”

on page 2-4 and Section 2.3.3, “Magneto Resistive Cluster Heads” on page 2-4,

the DCM contains a number of components that interact to perform these
functions. These components include the advanced head guide assembly, take-up
reel, drive motor, the optical servo system, and the tape heads.

CHAPTER 2: SDLT 220/320 Product Information

The SDLT path, from the first tape guide through the take up reel and motor, has
been simplified and improved from the previous DLT systems. The addition of
servo technology in the POS system has allowed for the reduction of the
number of tape guides from six to four. This provides a simpler tape path in the
SDLT drive, improving performance and reliability.

In addition to its mechanical components, the DCM also contains printed circuit
boards that control the functions of the DCM and the tape heads.

CHAPTER 2: SDLT 220/320 Product Information

2.4.2 Tape Control Module

The Tape Control Module (TCM) implements the functions required to buckle and
unbuckle the tape and control the tape motion. The TCM consists of a variety of
components:

• TCM PCBA (Printed Circuit Board Assembly)

• Base Plate

• Cartridge Receiver

• Positive Engagement Tape Leader Buckling Mechanism.

Other components include the tape supply motor assembly and the floor plate
assembly.

TCM PCBA

The TCM has its own Printed Circuit Board Assembly (PCBA) that controls the
functions of the TCM and interfaces with the main controller board in the EIM. By
designing the TCM as a distinct module, it allows the TCM to be manufactured
and tested as a stand-alone module, simplifying the design, manufacturing and
troubleshooting processes.

Base Plate

The SDLT base plate is an aluminum die casting with precisely machined surfaces
that acts as the support platform for the other modules and for the drive enclosure.
The base plate also includes the precision mounting holes used to install SDLT
drives into a server or tape library. The SDLT base plate, and therefore the entire
SDLT drive, conforms to the 5.25 inch, full-height form factor. This means that
SDLT drives are a little shorter, at the standard 8 inches, than the previous
generation DLT products.

Cartridge Receiver

On tape insertion, the cartridge receiver assembly guides the tape into its operating
position, opens the cartridge door, unlocks the cartridge brakes, engages the
cartridge drive motor, and secures the tape for operation. On tape ejection, the

CHAPTER 2: SDLT 220/320 Product Information

cartridge receiver assembly reverses the process and automatically ejects the tape a
fixed distance from the front of the drive. There is no longer a manual lock and
release handle to operate when loading and unloading the cartridge. This “soft
load” capability makes SDLT easier for customers to use in both stand-alone
applications and automated tape libraries.

Positive Engagement Tape Leader Buckling Mechanism

This design for SDLT uses a solid metal pin attached to the drive leader which
positively links with molded clips that are permanently attached to the tape leader
inside the cartridge. The buckling mechanism is responsible for engaging the tape
leaders upon cartridge load and disengaging them on cartridge unload.

The SDLT buckling mechanism has been designed to work with the new leaders of
the SDLT design as well as the leaders of the previous DLT design, allowing
backward-read compatibility (BRC) of DLT IV cartridges in the SDLT system.

2.4.3 Front Panel M odule

The Front Panel Module (FPM) of the system (sometimes referred to as the bezel)
performs a number of functions. The functions of the SDLT FPM include:

• Protecting the front of the TCM from physical damage

• Channeling airflow through the system

• Aligning the cartridge when it is inserted into the system

• Providing system status and information through LEDs

• Enabling cartridge ejection

• Delivering the overall cosmetic look of the system.

The FPM is a single module with lenses for the system’s LEDs and a button to
activate the drive eject switch. Unlike previous generations of DLT, the SDLT
front panel contains no electronics.

CHAPTER 2: SDLT 220/320 Product Information

2.4.4 Elect ronic Interface Module

The Electronic Interface Module (EIM) is the electronic heart of the SDLTsystem.
It provides the main control function for the system and the interface from the
system to the host computer. The EIM provides the Advanced PRML feature of
Quantum’s SDLT technology; advanced PRML is described in “Advanced Partial

Response Maximum Likelihood” on page 2-5.

The EIM consists of two major boards: the Integrated Controller Module (ICM),
and a separate Host Interface Module (HIM). The ICM contains the main
controller and servo micro-processor, the custom-designed SDLT ASICs and the
cache memory while the HIM implements the interface between the host system
and the drive. This allows easy configuration of the drive to match different host
interfaces by simply substituting the appropriate HIM card.

As with the other major modules of the SDLT technology, the EIM has been
designed to be manufactured and tested as a distinct module.

2.4.5 SDLT Cartridge Tape Module

As with all tape technologies, the SDLT cartridge is a key part of the overall
system. The main function of the Cartridge Tape Module (CTM) is to provide the
magnetic recording media used by the system to store customer information. The
CTM also provides the protective cartridge that allows the media to be removed
andstoredsafely.

From the outside, the SDLT cartridge looks very similar to the DLT IV cartridges.
The basic geometry, write protection switch, and label space are unchanged from
the DLT IV cartridge. This simplifies the integration of SDLT into existing
operating environments and into automated tape libraries. The SDLT cartridge is
easy to recognize; it has a different color than the DLT IV cartridge and contains a
distinctive pattern molded into the shell.

The SDLT cartridge has a new, more rugged design that includes a thicker internal
circular wall surrounding the media and more structural ribbing to increase overall
cartridge resilience and reduce potential damage to the cartridge if it should be
dropped. New, wear-resistant materials reduce the potential for debris generation
and increase the life of the cartridge.

CHAPTER 2: SDLT 220/320 Product Information

2.5 Key Differences Between the SDLT 220
and the SDLT 320

Table 2-1 compares important features in the SDLT 220 and the SDLT 320

products.

Table 2-1. A Comparison of SDLT 220 and SD LT 320 Features

Parameter SDLT 220 SDLT 320

Capacity

Compressed
Uncompr essed

Data Transfer Rate

Compressed
Uncompr essed

‡

‡

220 GB
110 GB

22 MBps
11 MBps

320 GB
160 GB

32 MBps
16 MBps

Media Compatibility SDLT Tape 1

DLT Tape IV (Read Only)
DLT 1/VS80

TRS13 Model (Read Only)

‡ The compressionrates shown assume an industry standard 2:1 compressionratio.Actual compressionratios

achieved depend on the redundancyof data files being recorded.

Reliability

MTBF
Media Durability
Warranty

Miscellaneous Product Features

Tape Speed 116 ips 122 ips
Linear Density 133 Kbpi 193 Kbpi
Cache Size 32 MB 64 MB

Interfaces Available

250,000 P ower On Hrs
1,000,000 passes
3years

Ultra 2 SCSI, LVD
Ultra 2 SCSI, HVD

SDLT Tape 1
DLT Tape IV (Read Only)

DLT 1/VS80

(Read Only)

250,000 Power On Hrs
1,000,000 pa sses
3years

Ultra 2 SCSI, LVD
Ultra 2 SCSI, HVD

CHAPTER 2: SDLT 220/320 Product Information

2.6 Tandberg Data Diagnostics Tools

Tandberg Data frequently provides new and updated tools to use with its tape
drives. For example:

SDLT Update This utility is a SCSI-based Windows

application that allows you to load tape drive
firmware and create code upload tapes.

GSLink Allows you to quickly diagnose the integrity

of the drive using an infrared (wireless)
communication connector located on the front
panel of the tape drive.

Pocket
GSLink

Allows you to diagnose the integrity of a
Super DLTtape drive using your Pocket PC.
This application uses infrared (wireless)
communication between your Pocket PC and
the Super DLTtape drive. Pocket GSLink runs
on the Pocket PC 2002 operating system.

Density Select A utility that enables you to specify that your

SDLT 320 tape drive write data cartridges that
are backward compatible with your SDLT 220
tape drives.

All tools are available on the Tandberg Data’s web site, http://www.tandberg.com.New
tools and utilities get added frequently. Follow the path Support =>
DLTtape Support and look at the list to see what is available.

2.7 TapeAlert

SDLT drives are delivered with TapeAlert features built in. The internal SDLT
firmware constantly monitors the device’s hardware and media, checking for
errors and potential difficulties. Any problems identified are flagged on the SCSI
log page, where 64 bytes have been reserved for use by TapeAlert.

After a backup has been completed, the TapeAlert-compatible backup application
will automatically read the device’s TapeAlert SCSI log page to check for any
problems. If an error is flagged, your backup software displays a clear warning
message on your screen, and adds the TapeAlert messages to its logs. These
messages are standard across all applications that support TapeAlert, and are
designed to give clear explanation of the problem and suggested resolution. For
example, if you were attempting to back up onto an expired tape, you would see
the following message:

WARNING: The tape cartridge has reached the end of its useful life:

CHAPTER 2: SDLT 220/320 Product Information

Copy any data you need to another tape.
Discard the old tape.

CHAPTER 2: SDLT 220/320 Product Information

CHAPTER 3 Drive Specifications

This chapter describes various specifications that apply to the Tandberg
Super DLTtape system, which include:

• “Product Specifications” provides the product specifications for the SDLT

220/320 tape drives.

• “Functional Specifications” provides the functional specifications for the

SDLT 220/320 tape drives.

• “Environmental Specifications” provides the environmental specifications for

the SDLT 220/320 tape drives.

• “Recording Media Specifications” provides the media specifications for

SDLT I and DLT IV tape cartridges.

3.1 Product Specifications

The following subsections contain full product specifications for the Tandberg
SDLT 220/320 tape drives.

CHAPTER 3: Drive Specifications

3.1.1 Interface Type

The SDLT drive is available in either of two possible SCSI interface versions;
these versions provide three possible SCSI interface types:

• Multimode Single-Ended (MSE) provides one of two interfaces:

! Low Voltage Differential (LVD) running at 80 MB/second, or
! Single Ended (SE) running at 40 MB/second.

• High Voltage Differential (HVD) running at 40 MB/second.

NOTE: By default, the SDLT system is shipped with a wide SCSI

configuration that you can convert to narrow SCSI, if you
wish. For details, refer to “Configuring the Internal Drive

for Narrow SCSI” on page 4-10.

3.1.2 Physical Dimensions

Table 3-1 provides physical dimensions for the SDLT system.

Table 3-1. SDLT 220/320 Physical Dimensions a nd Shipping Weight

Description Internal Version Tabletop Version

Height

Width

Depth

Weight* 2.38 kg (5 lbs. 4 oz) 6.27 kg (13 lbs. 13 oz)
Shipping

Weight*

* Weightsdepend on configuration. The packaging may change dependingon the shipping weight.
Note: M ounting hole pattern for the bottomand sides of the system is industry standard.

82.55 mm (3.25 in) without front bezel;

86.36 mm (3.40 in) with front bezel.

146.05 mm (5.75 in) behind front bezel;

148.34 mm (5.84 in) with front bezel.

203.20 mm (8.00 in) measured from back of front
bezel; 212.09 mm (8.35 in) including front bezel.

3.77 kg (8 lbs. 5 oz) 9.90 kg (21 lbs. 13 oz)

160.02 mm (6.30 in)

175.26 mm (6.9 in)

325.12 mm (12.8 in)

3.1.3 Storage Capacity

Table 3-2 provides native and compressed capacity ranges for the SDLT I tape

cartridge:

Table 3-2. SDLT 220/320 Storage Capacity

SDLT 220 SDLT 320

Native Storage Capacity 110 GB 160 GB

CHAPTER 3: Drive Specifications

Compressed Storage
Capacity

In accordance with industry practice, a typical compression ratio of 2:1 is quoted.
Actual compression ratios achieved depend on the redundancy and type of data
files being written.

3.1.4 Compression

The drive contains on-board hardware to compress and decompress data using a
DLZ algorithm. The default setting for data compression is ON.

220 GB
(2:1 compression ratio)

320 GB
(2:1 compression ratio)

CHAPTER 3: Drive Specifications

3.1.5 Data Integrity

SDLT data transfer errors are extremely rare; data integrity for the overall tape
system is shown in Table 3-3.

Table 3-3. Data Transfer Error Rates

Error Type Frequency

Error Rates Recoverable READ

Detected, Unrecoverable READ

Undetected READ

Rewrite errors

<1 error in 10

<1 error in 10

<1 error in 10

<5 per 10

6

bytes written

6

bytes read

17

bits read

27

bits read

CHAPTER 3: Drive Specifications

3.1.6 Maximum Data Transfe r Rat e

The maximum sustained (and burst) data transfer rates for SDLT drives are shown in

Table 3-4.

Table 3-4. Maximum Data TransferRates

Configu

Native

SDLT 220
Sustained

SDLT220

Com­pressed‡ Native

Burst
Max*

SDLT 320
Sustained

SDLT320

Com­pressed‡

ration

HVD
(Ultra 1
SCSI)

LVD
(Ultra 2
SCSI)

* Burst speeds are limited by the SCSI bus itself, not the design of SDLT 220/320 or SDLTtape.
‡ The compressionrates shown assume an industry standard 2:1 compressionratio.Actual compressionratios

Narrow 11 MB/sec 20 MB/sec 20 MB/sec 16 MB/sec 20 MB/sec 20 MB/sec

Wide 11 MB/sec 22 MB/sec 40MB/sec 16 MB/sec 32 MB/sec 40 MB/sec

Narrow 11 MB/sec 22 MB/sec 40 MB/sec 16 MB/sec 32 MB/sec 40 MB/sec

Wide 11 MB/sec 22 MB/sec 80 MB/sec 16 MB/sec 32 MB/sec 80 MB/sec

achieved depend on the redundancyof data files being recorded.

NOTE: Cable lengths and cable type can limit attainable transfer

rate; for details, refer to a separate document,

Super DLT Design and Integration Guide, P/N 432588

rev. 01 or later.

Burst
Max*

CHAPTER 3: Drive Specifications

3.1.7 Reliability (MTBF)

Mean time between failures (MTBF) for the overall tape system is projected to be
250,000 hours. Head life is a minimum of 30,000 tape motion hours and an
average of 50,000 tape motion hours. Media durability is 1,000,000 passes.

NOTE: Tandberg Data does not warrant that predicted

MTBF is representative of any particular unit installed for
customer use. Actual figures vary from unit to unit.

3.1.8 Load and Unload Cycles

Load and unload cycles are rated at 15,000 for the cartridge itself. Table 3-5 shows
the number of load and unload cycles and tape insertions an SDLT drive can
perform before it needs to be replaced.

Table 3-5. Load and Unload Cycles (Maximum)

SDLT 220 SDLT 320

Load/unload cycles 50,000 100,000
Tape insertions* 50,000 100,000

*Aninsertioniswhenatapeisinsertedintothereceiver,loadedtoBOT,andunloaded.

3.2 Functional Specifications

The following subsections contain full functional specifications for the Tandberg
SDLT 220/320 tape drives.

3.2.1 SDLT 220/320 Performance Data

Table 3-6 provides performance data for the SDLT system. For a comparison of

SDLT 220/320 storage capacities, refer to Section 3.1.3, “Storage Capacity” on

page 3-3.

Table 3-6. SDLT 220/320 Performance Data

Feature SDLT 220 SDLT 320

CHAPTER 3: Drive Specifications

Drive Read / Write
Transfer Rate*

Tracks

Track Density 1058 tracks pe r inch (tpi) Same
Linear Bit De nsity 133 Kbits per inch (bpi) 193 Kbits per inch (bpi)
Read / Write Tape Speed 116 inches per second (ips) 122 inches per second (ips)
Rewind Tape Speed 160 ips Same
LinearSearch Tape S peed 160 ips Same
Average Rewind Time 69seconds Same
Maximum Rewind Time 140 seconds Same
Average Access Time

(from BOT)
Maximum Access Time

(from BOT)

Load to BOT

11 MB/second, native 16 MB/second, native

56 logical tracks;
448 physical tracks

70 seconds Same

142 seconds Same

12 seconds (typical)
40 seconds (unformatted tape)

Same

Same

Unload from BOT 12 seconds Same

Nominal Tape Tension

* Depending on data type and SCSI bus limitations/system configuration.
Note that data is typical; times may be longer if error recoverytime is needed.

Stationary = 3.0 ± 0.5 oz
Operating Speed = 3.5 ± 0.5 oz

Same

CHAPTER 3: Drive Specifications

3.2.2 Shock and Vibration Specifications

The following tables provide non-operating and operating shock and vibration
specifications for the SDLT system.

Table 3-7. Non-Operating Shock Specifications(Unpackaged)

Shock (Unpackaged)
Pulse Shape

Peak Acceleration 40 G 140 G
Duration 10 ms (180 inches/second) 2 ms
Application X,Y,Z axes, twice in each axis (once in each direction)

Square wave ½ sine pulse

Table 3-8. Non-Operating Shock Specifications(Packaged, Drop)

Shock (Packaged,
Drop)

Drop

Height
of Drop

42 inches
36 inches

Number
of Drops Package Weight

16 drops total
16 drops total

0 lbs. < package weight
20 lbs. < package weight

≤ 20 lbs.

≤ 50lbs.

Table 3-9. Non-Operating Vibration Specifications

Vibration (Unpackaged)

CHAPTER 3: Drive Specifications

Type

Frequency R ange 5 - 500 - 5 Hz Upward and downward sweep

Acceleration Level

Application X,Y,Z axes Sweep rate = ½ octave /minute

Sine Sweep

0.02" DA

1.0 G

Between5and31Hz(crossover)
Between 31 and 500 Hz (crossover)

Type Random

Frequency Range 10 - 500 Hz
Acceleration Level 2.0 G

PSD Envelope
Application X,Y,Z axes Sweep rate = 60 minutes / axis

0.008 G

2

/Hz

Vibration (Packaged)
Type

Frequency Range

Application

Random
Truck Profile* (0.5 G rms)

Air Profile* (1.0 Grms)
X,Y, Z axes (30 minutes, each profile and each axis, for a total of 3

hours)

Type

Frequency Range 5 - 150 - 5 Hz ; 0.5 octave /minute, 0.5 G

Application

* Air and truck profiles are specified in ASTM D4728, Standard Test Method for Random
Vibration Testing of Shipping Containers.

Sine,Sweep,andDwell

X,Y,Z axes; dwell at lowest resonant frequency in axis for 30
minutes.
Additional 30 minutes for e ach additional resonance; up to 4
resonances total.

CHAPTER 3: Drive Specifications

Table 3-10. Operating Shock and Vibration Specifications

Shock
Pulse Shape

Peak Acceleration 10 G
Duration 10 ms
Application X,Y,Z axes, twice in each axis (once in each direction)

Vibration
Type

Frequency R ange 5 - 500 - 5 Hz Upward and downward sweep

Acceleration Level

Application X,Y,Z axes Sweep rate = 1.0 octave per minute

½ sine pulse

Sine Sweep

0.25 G

0.010" DA

Between 22 and 500 Hz
Between5and22Hz(crossover)

3.2.3 Current and Power Requirements

Table 3-11 on page 3-11 lists the current and power requirements for both versions

of the tape system (internal and tabletop). The tabletop version requires AC power.

The highest current (and power) is drawn during the native write modes and
backward-read compatibility (BRC) read modes, so they are outlined in

Table 3-11. Standby is measured with the tape loaded and tensioned or

untensioned, and Idle is measured with power on with no tape loaded. (The
power drawn in these two modes is similar enough that they are listed together.)
Power-up current surges are less than those encountered during motor
accelerations, and so are not listed separately .

NOTE: In Table 3-11, the current and DC power values are

relevant to the internal drive, while the AC power values
are relevant to the tabletop drive.

Table 3-11. Current and Power Specifications

CHAPTER 3: Drive Specifications

Mode

5 V Current (A)

1

MaxPk

MaxRms

2

Typ

12 V Current (A)
MaxPk

3

1

MaxRms

DC Power (W)

4

2

Typ

Max

3

Typ

AC Power (W)
Max

5

6

Standby / Idle 3.2 3.0 2. 9 0.6 0.5 0.4 20 19 34 29
Media Loading

/ Unloading
220/320 Write–

Motor Start

8

220/320 Write–
Streaming

Max for SDLT

9

Modes

BRC Read–
Motor Start

8

BRC Read–
Streaming

Max for BRC

9

Modes

3.8 3.1 2.9 4.8 1.0 0.7 25 24 38 33

6.1 3.1 3.0 4.8 1.0 0.7 25 24 33 30

6.3 4.3 3.8 2.1 0.7 0.7 28 27 42 38

4.3 1.0 28 42

3.9 3.0 2.8 2.3 0.7 0.6 23 22 38 32

5.2 3.3 3.1 1.8 0.7 0.6 24 22 41 33

3.3 0.7 24 41

Typ

7

1. The Max-Peak value represents short current spikes drawn for durations of < 50us. On the 12V supply, the peaks
correspond to the pulse width modulated switchingof the motors. These values are calculated from the average of
Peak-ripple-current+ 2 sigma, measuredat +5% DC voltage.

2. The Max-Rms value is the average of the maximum RMS current drawn during this operating mode. These
values are calculated from the average of RMS current + 3 sigma, measured at nominal DC voltage.

3. The typical current is calculated from the average of all RMS current drawn during this operating mode,
measured at nominalDC voltage.

4. The Max DC power is calculated from the typical DC power + 3 sigma, measured at nominal DC voltage. This
value takes into account that the peak currents on the 5V and 12V do not occur at the same time.

5. The TypicalDC power is calculated from the average RMS DC power drawn during this operating mode,
measuredat nominal DC voltage. This value also takes into account that the peak currents on the 5V and 12V do
not occur at the same time.

6. The Max AC power is calculated from the typical AC power in tabletop drives + 3 sigma.

7. The Typical AC power is calculatedfrom the average of AC power drawn in tabletop drives.

8. The motor start modes draw the most current from the 12V supply,so they are shown separately. These events
last < 1 second and occur at a duty cycle of less than 25%.

9. The Max valuesfor each mode are based on the Max-rmsvalues, since the peak valuesare of very short duration.

CHAPTER 3: Drive Specifications

3.2.4 Tape System Recording Method

The SDLT 220 tape system uses the Partial Response Maximum Likelihood
(PRML) 32/33 encoding method for reading/writing SDLT format.

The SDLT 320 tape system uses the PRML 32/33 encoding method for reading/
writing SDLT 320 and 220 format.

CHAPTER 3: Drive Specifications

3.3 Environmental Specifications

The SDLT 220/320 tape drive operates in environments that include general
offices and workspaces with systems capable of maintaining standard comfort
levels.

The following subsections provide the environmental specifications for the SDLT
systems (both the internal and the tabletop configurations). For long-term trouble­free operation, it is strongly recommended that SDLT tape drives be used in a
clean, smoke-free environment.

3.3.1 Air Flow Requ irem ents

Adequate air flow must be provided for the internal tape drive to dissipate the heat
resulting from continuous drive operation. Specifically, the air flow must be
sufficient to keep the tape path temperature below 52°C.

NOTE: It is important to realize that the amount of air flow

provided for the tape drive determines the maximum
ambient temperature in which the drive can operate.

For more details about specific temperatures inside the drive at specific locations,
refer to a separate document, the Super DLT Design and Integration Guide

P/N 432588, rev. 01 or later.

CHAPTER 3: Drive Specifications

3.3.2 Temperature and Humidity

The ambient operating environment f or the tape drive may not exceed the limits shown in

Table 3-12. (The specifications shown in the table are valid for both the internal and

tabletop tape drives
Table 3-12. Temperature and Humidity Specification

Specification Operating Limits

Wet Bulb Temperature 25°C (77°F) 25°C (77°F)

.)

Non-Operating Limits
(Power On; No Tape
Loaded)

DryBulbTemperature
Range

Temperature Gradient 11°C (20°F) / hour (across range) 15°C (27°F) / hour (across range)
Relative Humidity 20% to 80% (non-condensing) 10% to 90% (non-condensing)
Humidity Gradient 10% / hour 10% / hour

10°Cto40°C(50°Fto104°F) 10°Cto40°C(50°Fto104°F)

3.3.3 Storage and Shipment

The ambient storage and shipment environment for the tape drive may not exceed the
limits shown in
the internal and tabletop tape drives

Table 3-13. Drive Storage and Shipment Specifications

Specification

Wet Bulb Temperature 46°C (114°F) 46°C (114°F)
Dry Bulb Temperature -40°C to 66°C (-40°F to 150°F) -40°C to 66°C (-40°F to 150°F)

Table 3-13. (The specifications shown in the table are valid for both

.)

Storage
(Unpacked or Packed) Shipping

Temperature Gradient 20°C (36°F) / hour (across range) 20°C (36°F) / hour (across range)
Relative Humidity 10 to 95% (non-condensing) 10 to 95% (non-condensing)
Humidity Gradient 10% / hour 10% / hour

* Note that these specifications apply to the tape drive only. Media specifications are listed in

“Recording Media Specifications” on page 3-15.

3.3.4 Altitude

Both the internal and tabletop tape drives operate in normal pressures from –500 to
10,000 feet when operated within the ambient operating environments specified in

“Temperature and Humidity” on page 3-14.

CHAPTER 3: Drive Specifications

The drive will operate to 30,000 feet for temperatures within 15

3.3.5 Particulate Cont amination Limits

The ambient operating environment for the tape drive may not exceed the
particulate counts shown in Table 3-14.

Table 3-14. Particulate Contamination Limits

Particle Size
(microns)

0.1

0.5

5.0

Number of Particles ≥
Particle Size per
Cubic Meter

8.8x10

3.5x10

2.5x10

7

7

5

Number of Particles≥
Particle Size per
Cubic Foot

2.5x10

1.0x10

7.0x10

± 5°C.

6

6

3

3.4 Recording Media Specifications

The following tables provide specifications for SDLT I media. Basic media
specifications for the SDLT I are shown in Table 3-15. Operating, storage, and
shipping environment limits for the DLTtape IV cartridges are shown in

Table 3-16.

CHAPTER 3: Drive Specifications

Table 3-15. Super DLTtape I Media Specifications

Description Specifications

Width 0.5 in.
Magnetic Coating 300 nm metal particle
Length 1800 feet (1765 feet usable)
Coercivity 1800 Oe
Cartridge Dimensions 4.1 in x 4.1 in x 1.0 in
Shelf Life 30 years min. @ 20°C & 40% RH (non-condensing)
Usage 1,000,000 passes (typical office/computer environment)
Cartridge Housing Color Dark Green

Table 3-16. DLTtape Media Operating and Storage Limits

Operating Conditions

Temperature 10° to 40°C(50° to 104°F)
Relative Humidity 20% to 80% (non-condensing)

Storage Conditions With Data: Without Data:

Temperature 18° to 28°C(64° to 82°F) 16° to 32°C(66° to 89°F)
Relative Humidity 40% to 60% (non-condensing) 20% to 80% (non-condensing)

Shipping Conditions

Temperature -17°C to 49°C (0°F to 120°F)
Relative Humidity 20 to 80% (non-condensing)
Maximum Wet Bulb

Temperature
Maximum Dew Point 2°C (36°F)

26°C (79°F)

CHAPTER 3: Drive Specifications

3.4.1 Backward- Read Compatibility Transfer Rates

Both the SDLT 220 and 320 drives feature an optional backward-read
compatibility (BRC) mode. When in BRC mode, the drives are capable of reading
DLTtape IV tapes with DLT4000, DLT7000, DLT8000, and DLT 1/VS80 formats.
The BRC transfer rates for the SDLT drive are listed in Table 3-17.

Table 3-17. Backward-Read Compatibility (BRC) Transfer Rates

Native Read

Format Cartridge Type Native Capacity

(GB)

SDLT 320 SDLT I 160 16.0
SDLT 220 SDLT I 110 11.0
DLT 8000 DLT IV 40 4.0
DLT 7000 DLT IV 35 3.5

Transfer Rate
(MB/second)

DLT 4000 DLT IV 20 1.5
DLT 1/ VS80 DLT IV 40 3.0
Notes:

• Transfer rates quoted are nominal, measured reading uncompressed data.

• Non-SDLT drives will eject a cartridge written in SDLT 320 format.

• The SDLT 320 can read and write the SDLT 220 format at the native SDLT 220 transferrate

of 11.0 MB/sec.

CHAPTER 3: Drive Specifications

CHAPTER 4 Installing Your Tape Drive

This chapter describes how to install the internal tape drive into a system. This
includes configuration jumper settings, connector pin assignments, installation
instructions, power and signal cabling descriptions, and operating instructions.
This chapter also includes information on configuring and connecting the tabletop
version of the drive into a system.

This chapter covers the following topics:

• “Safety, Handling, and ESD Protection” describes appropriate guidelines

when working with the tape system.

• “Pre-Installation Guidelines” describes proper steps to take before the drive is

installed in a system. This includes recording the model and serial numbers,
checking that the proper SCSI controller and cable have been delivered and
checking the drive for proper operation before installing it into a system.

• “Configuring and Installing an Internal Tape Drive” describes how to

configure and install an internal tape drive into a system.

• “Configuring and Installing a Tabletop Drive” describes how to configure and

install the tabletop version of the tape drive.

• “Confirming the Installation” describes how to confirm that the drive has been

installed correctly.

CHAPTER 4: Installing Your Tape Drive

4.1 Safety, Handling, and ESD Protection

Inappropriate or careless handling of tape systems may result in damage to the
product. Follow the precautions and directions to prevent damaging the tape
system. In addition, follow the pre-installation guidelines to ensure that you have
the correct hardware for your system configuration.

4.1.1 Safety Precautions

For your safety, follow all safety procedures described here and in other sections of
the manual.

1. Remove power from the system before installing or removing the tape drive to

prevent the possibility of electrical shock or damage to the tape drive. Unplug
the unit that contains or is to contain the drive from AC power to provide an
added measure of safety.

2. Read, understand, and observe all label warnings.

3. The POS uses a Class I laser product. This laser product complies with 21

CFR 1040.10 as applicable on the date of manufacture.

C

AUTION: While the tape drive chassis is open, you can be exposed

to invisible laser radiation; take care to avoid direct
exposure to the beam.

4.1.2 Handling

Damage to the tape system can occur as the result of careless handling, vibration,
shock, or electrostatic discharge (ESD). For more details about ESD, refer to

“Electrostatic Discharge Protection” on page 4-4.

Follow these guidelines to avoid damage to the drive:

AUTION: Always handle the tape system with care to avoid

C

damage to the precision internal components. Do not
place hands inside the tape drive’s receiver area. Hold
the internal tape drive by the sides or the tabletop drive
by the bottom. Never hold either drive by inserting
fingers into the receiver area on the front of the drive.
Damage to the receiver area may occur if the drive is
lifted or carried in this manner.

• Always observe prescribed ESD precautions.

CHAPTER 4: Installing Your Tape Drive

• Keep the internal drive in its anti-static bag until ready to install.

• Always use a properly fitted wriststrap or other suitable ESD protection when

handling the drive.

• Hold the internal tape drive only by its sides.

• Do not bump, jar, or drop the drive. Use care when transporting the drive.

• Always handle the drive carefully and gently. A drop of ¼ inch onto a bench

or desktop may damage a drive.

• Never place the tape drive so that it rests on its front bezel. Always gently

place the drive flat, printed circuit board (PCB) side down, on an appropriate
ESD-protected work surface to avoid the drive being accidentally knocked
over.

• Do not pack other materials with the drive in its anti-static bag.

• Place the drive in the anti-static bag before placing it in a shipping container.

• Do not stack objects on the drive.

• Do not expose the drive to moisture.

• Do not place foreign objects inside the tape system’s receiver area.

CHAPTER 4: Installing Your Tape Drive

4.1.3 Electrostatic Discharge Protection

Several electrical components of the tape system are sensitive to static electricity
and Electrostatic Discharge (ESD). Even a static buildup or discharge that is too
slight to feel can be sufficient to destroy or degrade a component’s operation.

To minimize the possibility of ESD-related damage to the system, we strongly
recommend using both a properly installed workstation anti-static mat and a
properly installed ESD wrist strap. When correctly installed, these devices reduce
the buildup of static electricity that might harm the system.

Observe the following precautions to avoid ESD-related problems:

• Use a properly installed anti-static pad on your work surface.

• Always use a properly fitted and grounded wrist strap or other suitable ESD

protection when handling the tape system and observe proper ESD grounding
techniques.

• Hold the drive only by its sides. Do not touch any components on the printed

circuit board assembly (PCBA).

• Leave the drive in its anti-static bag until you are ready to install it in the

system.

• Place the drive on a properly grounded anti-static work surface pad when it is

out of its protective anti-static bag.

• Do not use the bag as a substitute for the work surface anti-static pad. The

outside of the bag may not have the same anti-static properties as the inside. It
could actually increase the possibility of ESD problems.

• Do not use any test equipment to check components on the PCBA. There are

no user-serviceable components on the drive.

CHAPTER 4: Installing Your Tape Drive

4.2 Pre-Installation Guidelines

Before you begin, check the contents of the box, record the applicable numbers,
check for SCSI controller and cable compatibility, and confirm software and
operating system compatibility. Finally, check the drive to make sure it is operating
properly before installing it in a system.

1. Unpack and review the contents of the box to ensure that nothing has been
damaged. If items have been damaged, contact your drive provider.

2. Record the model and serial number of the SDLT system. These numbers
provide specific information about the SDLT system and will be very
helpful if you have to contact technical support. These numbers can be
found on the bottom of the drive enclosure.

3.Check the SCSI cable to ensure it is compatible with the SCSI
controller card in the host computer.

4. Check the SCSI interface on the host computer to ensure that it is
compatible with the drive. Possible interfaces include MSE single-ended,
MSE low voltage differential, or high voltage differential. Remember that a
single ended or low voltage differential drive will only work with a system
that has an MSE controller card installed; and a high voltage differential
drive will only work with a differential controller card.

5. Confirm that your back-up software and operating system are compatible
with the drive. Refer to www.tandberg.com for the most current
compatibility information.

CHAPTER 4: Installing Your Tape Drive

4.3 Configuring and Installing an Internal
Tape Drive

This section provides information for configuring and installing a tape drive into a
system. See “Configuring and Installing a Tabletop Drive” for information on
configuring and installing a tabletop tape drive.

C

AUTION: Before you begin, review the safety, ESD, and handling

precautions described at the beginning of this chapter to
avoid personal injury or damage to equipment.

Configuration for the SDLT system includes the following:

• Setting the SCSI ID for the drive (default = SCSI ID 5).

• Configuring the drive to provide TERMPWR.

• Setting the configuration jumper (default = wide SCSI enabled).

If you want to change any of the settings, refer to the applicable subsection;
otherwise proceed directly to the tape drive’s installation procedures in “Installing

the Internal Tape Drive” on page 4-10.

CHAPTER 4: Installing Your Tape Drive

4.3.1 Setting the Internal Drive SCSI ID

Each device on the SCSI bus must have a unique SCSI ID address assigned to it.
For specific recommendations for assigning SCSI IDs, refer to the system or SCSI
controller documentation.

Internal drives can be configured for SCSI ID addresses that range from 0 to 15 in
one of two ways:

• Jumper the 10-pin SCSI ID block located on the back of the drive (Figure 4-1

on page 4-8), or

• In a library setting, you can set the IDs through firmware. (The firmware

default is SCSI ID = 5 and no jumpers are installed on the jumper block.)

NOTE: The default setting for the tape drive is 5; the host adapter

setting is typically SCSI ID 7. If you choose to omit all
jumpers from the SCSI ID block, the tape drive will use
the default setting of 5.

This subsection discusses setting the SCSI ID on the internal drive manually via
the jumper block. Table 4-1 lists the SCSI ID address and jumper settings.

CHAPTER 4: Installing Your Tape Drive

Controller Diag Port (8 pin)

(Diagnostic use only)

Power Connector

(4 pin)

Loader Connector

RS-422 (8 pin)

SCSI ID Jumper Block

(No jumpers on this block =

default SCSI ID of 5)

!"Denotes Pin 1 orientation

Configuration Jumper

(Omit jumper on Pins 1-2

to enable wide SCSI)

SCSI Port

(68 pin)

Pin 1

TERMPWR Block

(Installjumper on Pins 1-2

to enable TERMPWR)

* Figure not drawn to scale

Figure 4-1. Connectors on the Back Panel

Figure 4-2. Back Panel Connector Loca tions (Drawn to S cale)

CHAPTER 4: Installing Your Tape Drive

Table 4-1. SCSI ID Address Selections

SCSI ID Jumper Across Pins:

9-10* 7-8 5-6 3-4 1-2

0 10000
1 10001
2 10010
3 10011
4 10100
5(default)00000
6 10110
7 10111
8 11000
9 11001
10 11010
11 11011
12 11100
13 11101
14 11110
15 11111

0 = No Jumper installed, 1 = Jumper installed
* Jumpering Pins 9-10 forces the drive to ignore the firmware valueand read the value jumpered on the block.

CHAPTER 4: Installing Your Tape Drive

4.3.2 Conf iguring the Internal Drive for TERMPWR

A SCSI bus must be terminated at each end of the bus. All signals not defined as
RESERVED, GROUND, or TERMPWR shall be terminated exactly once at each
end of the bus. At least one device must supply terminator power (TERMPWR).

To enable TERMPWR, install the jumper across Pins 1 and 2 (Figure 4-3)onthe
TERMPWR jumper block. Remove the jumper to disable TERMPWR. Pins 3 and
4 on this block are reserved and require no jumpering.

Figure 4-3. TERMPWR Connector

4.3.3 Configur ing the Internal Drive for Narrow SCSI

The 8-pin Configuration Jumper block allows you to enable or disable the wide
SCSI bus. The default setting is for the wide SCSI bus to be enabled; there is no
jumper across Pins 1 and 2 when wide SCSI is enabled (Figure 4-1 on page 4-8).
To disable wide SCSI, install a jumper across Pins 1 and 2. Pins 3 through 8 are
reserved and require no jumpering.

4.3.4 Installing the Internal Tape Drive

Installing the tape drive requires securing the drive in its bay or chassis and
connecting SCSI bus and power cables, as described in “Securing the Internal Tape

Drive” below. When you have finished mounting and installing the drive, proceed

directly to “Confirming the Installation” on page 4-23 to confirm the installation.

Two perspective views of the internal tape drive are shown in Figure 4-4.

CHAPTER 4: Installing Your Tape Drive

Figure 4-4. SDLT 220/320 — Two Views (Front + Side + Top and Back + Side + Top)

Securing the Internal Tape Drive

This section describes how to mount and secure the drive in the system.

NOTE: In some system configurations it may be more convenient

to connect the SCSI bus and power cables to the drive
before securing i t in the system.

Because of the variety of mounting possibilities for tape drives, the instructions
presented here are general in nature. They should be used only as a guide for
mounting the drive in your system.

Mount the drive in the system by performing the following steps:

1. Position the drive in the system and align the drive mounting holes (side or

bottom) with those in the system. Figure 4-5 on page 4-12 shows the
mounting locations and dimensions for the drive.

C

AUTION: The screws used to mount the tape drive must be #6-32

UNC-2B screws. This type of screw is exactly the proper
length and will not damage the tape drive.

CHAPTER 4: Installing Your Tape Drive

2. Using four #6-32 UNC-2B screws, secure the tape drive in the bay or chassis.

Figure 4-5. Internal Drive Mounting Locations – Side and Bottom Views

Connecting the Internal Drive Cables

The three connectors on the back of the internal SDLT drive that are discussed in
this section are: 1) SCSI, 2) power, and 3) optional library/loader connectors. For
the tabletop model, typical connectors (power cords) are shown in Figure 4-8 on

page 4-23.

SCSI and Power Connectors

Figure 4-6 on page 4-14 shows the pin orientation for the 68-pin SCSI connector

and 4-pin power connector located on the back of the internal tape drive.

CHAPTER 4: Installing Your Tape Drive

Pin assignments for the three possible SCSI connectors are listed in a series of
tables: Multimode Single-Ended (MSE) Single Ended (SE) mode in Table 4-2 on

page 4-14, MSE Low Voltage Differential (LVD) mode in Table 4-3 on page 4-16,

and High Voltage Differential (HVD) mode in Table 4-4 on page 4-17.Pin
assignments for the power connector are listed in Table 4-5 on page 4-19.

1. Prior to connecting the SDLT drive to the host computer, make sure the drive

and computer are turned OFF.

2. If you are connecting several devices to the SCSI bus, connect only the drive

to the host computer at this time. Confirm that the host computer and drive are
communicating correctly before adding additional devices.

3. The SCSI bus must be terminated at each end. This drive may need to be

terminated:

! if the SDLT drive is the only device connected to the SCSI bus, OR
! if the SDLT drive is one of several devices connected to the SCSI bus,

and it is the last device connected to the SCSI bus.

4. If the answer to step 3 was affirmative, attach a “Y” connector to the drive’s

SCSI connector; then attach the SCSI cable to one leg of the “Y” and attach
the terminator to the other leg. Carefully connect the cables, to avoid bending
or damaging the connector pins.

5. Attach the power cables to the drive. Check the SCSI cable and termination

connections and ensure that they are attached correctly and seated firmly.

NOTE: The “Y” connector is not provided by Tandberg Data

Optional Loader Connector

The 8-pin optional loader connector provides signals to be used when the tape
drive is part of a loader/library configuration. Figure 4-6 on page 4-14 shows the
location of this connector; pin assignments for the loader connector are listed in

Table 4-6 on page 4-19.

CHAPTER 4: Installing Your Tape Drive

Figure 4-6. Connectors on the Back Panel (Drawn to Scale)

Table 4-2. MSE and SE Mode SCSI Connector Pin Assignments

Signal Name Pin Number Pin Number Signal Name

Ground 1 35 -DB(12)
Ground 2 36 -DB(13)
Ground 3 37 -DB(14)
Ground 4 38 -DB(15)
Ground 5 39 -DB(P1)
Ground 6 40 -DB(0)
Ground 7 41 -DB(1)
Ground 8 42 -DB(2)
Ground 9 43 -DB(3)
Ground 10 44 -DB(4)
Ground 11 45 -DB(5)
Ground 12 46 -DB(6)
Ground 13 47 -DB(7)
Ground 14 48 -DB(P0)
Ground 15 49 Ground

CHAPTER 4: Installing Your Tape Drive

Table 4-2. MSE and SE Mode SCSI Connector Pin Assignments (Continued)

DIFFSENS 16 50 Ground
TERMPWR 17 51 TERMPWR
TERMPWR 18 52 TERMPWR
Reserved 19 53 Reserved
Ground 20 54 Ground
Ground 21 55 -ATN
Ground 22 56 Ground
Ground 23 57 -BSY
Ground 24 58 -ACK
Ground 25 59 -RST
Ground 26 60 -MSG
Ground 27 61 -SEL
Ground 28 62 -C/D
Ground 29 63 -REQ
Ground 30 64 -I/O
Ground 31 65 -DB(8)
Ground 32 66 -DB(9)
Ground 33 67 -DB(10)
Ground 34 68 -DB(11)

Note: The minus sign (-) next to a signal indicates active low.

CHAPTER 4: Installing Your Tape Drive

Table 4-3. MSE LVD M ode SCSI Connector Pin Assignments

Signal Name Pin Number Pin Number Signal Name

+DB(12) 1 35 -DB(12)
+DB(13) 2 36 -DB(13)
+DB(14) 3 37 -DB(14)
+DB(15) 4 38 -DB(15)
+DB(P1) 5 39 -DB(P1)
+DB(0) 6 40 -DB(0)
+DB(1) 7 41 -DB(1)
+DB(2) 8 42 -DB(2)
+DB(3) 9 43 -DB(3)
+DB(4) 10 44 -DB(4)
+DB(5) 11 45 -DB(5)
+DB(6) 12 46 -DB(6)
+DB(7) 13 47 -DB(7)
+DB(P) 14 48 -DB(P)
Ground 15 49 Ground
DIFFSENS 16 50 Ground
TERMPWR 17 51 TERMPWR
TERMPWR 18 52 TERMPWR
Reserved 19 53 Reserved
Ground 20 54 Ground
+ATN 21 55 -ATN
Ground 22 56 Ground
+BSY 23 57 -BSY
+ACK 24 58 -ACK
+RST 25 59 -RST
+MSG 26 60 -MSG
+SEL 27 61 -SEL
+C/D 28 62 -C/D
+REQ 29 63 -REQ
+I/O 30 64 -I/O

CHAPTER 4: Installing Your Tape Drive

Table 4-3. MSE LVD M ode SCSI Connector Pin Assignments (Continued)

+DB(8) 31 65 -DB(8)
+DB(9) 32 66 -DB(9)
+DB(10) 33 67 -DB(10)
+DB(11) 34 68 -DB(11)

Table 4-4. HVD Mode S CSI Connector Pin Assignments

Signal Name Pin Number Pin Number Signal Name

+DB(12) 1 35 -DB(12)
+DB(13) 2 36 -DB(13)
+DB(14) 3 37 -DB(14)
+DB(15) 4 38 -DB(15)
+DB(P1) 5 39 -DB(P1)
Ground 6 40 Ground
+DB(0) 7 41 -DB(0)
+DB(1) 8 42 -DB(1)
+DB(2) 9 43 -DB(2)
+DB(3) 10 44 -DB(3)
+DB(4) 11 45 -DB(4)
+DB(5) 12 46 -DB(5)
+DB(6) 13 47 -DB(6)
+DB(7) 14 48 -DB(7)
+DB(P) 15 49 -DB(P)
DIFFSENS 16 50 Ground
TERMPWR 17 51 TERMPWR
TERMPWR 18 52 TERMPWR
Reserved 19 53 Reserved
+ATN 20 54 -ATN
Ground 21 55 Ground
+BSY 22 56 -BSY
+ACK 23 57 -ACK
+RST 24 58 -RST

CHAPTER 4: Installing Your Tape Drive

Table 4-4. HVD Mode S CSI Connector Pin Assignments (Continued)

+MSG 25 59 -MSG
+SEL 26 60 -SEL
+C/D 27 61 -C/D
+REQ 28 62 -REQ
+I/O 29 63 -I/O
Ground 30 64 Ground
+DB(8) 31 65 -DB(8)
+DB(9) 32 66 -DB(9)
+DB(10) 33 67 -DB(10)
+DB(11) 34 68 -DB(11)

CHAPTER 4: Installing Your Tape Drive

Table 4-5. 4-Pin Power Connector Pin Assignments

Pin Number Signal Name

1 +12 VDC
2 Ground (+12V return)
3 Ground (+5V return)
4 +5 VDC

Table 4-6. 8-Pin Loader Connector Pin Assignments

Signal Name Pin Number Pin Number Signal Name

Ground 1 5 SEND_TO_LOADER_H
REC_FROM_LOADER_H 2 6 SEND_TO_LOADER_L
REC_FROM_LOADER_L 3 7 Ground
Ground 4 8 LOADER_PRESENT_L

CHAPTER 4: Installing Your Tape Drive

4.4 Configuring and Installing a Tabletop
Drive

This section provides instructions for configuring and installing the SDLT tabletop
drive.

4.4.1 Conf ig uring the Drive

Figure 4-7 shows the location of the controls and connectors for the tabletop drive.

This model tape drive is normally configured to meet customer specifications
before leaving the factory,so should not require any internal configuration changes
on-site.

Figure 4-7. Back Panel of the Tabletop Model

SCSI ID The SCSI ID default for the tabletop drive is set to 3; the drive can be
configured for SCSI ID addresses that range from 0 to 15 using the SCSI ID
pushbutton. Press the button above or below the ID number display to set the

desired SCSI ID. The top button increases the ID number, the bottom button
decreases the ID number.

TERMPWR The TERMPWR setting for the tabletop drive is preconfigured at
the factory according to specific customer requirements. TERMPWR is not
selectable on-site.

4.4.2 Installing the Tabletop Drive

Tabletop drive installation consists of connecting SCSI bus and power cables.

Figure 4-7 on page 4-20 shows the location of the two SCSI bus connectors and

power connector on the back of the tabletop drive.

SCSI Cables

CHAPTER 4: Installing Your Tape Drive

The SCSI bus cable leading from the host adapter can be connected to either of the
connectors. If the tape unit is the last device on the bus, then a terminator should be
installed on the open connector. If the bus continues from the tape drive to another
SCSI device, then install a SCSI bus cable between the open connector and the
next device on the bus.

1. Prior to connecting the SDLT drive to the host computer, make sure the drive

and computer are turned OFF.

2. If you are connecting several devices to the SCSI bus, connect only the drive

to the host computer at this time. Confirm that the host computer and drive are
communicating correctly before adding additional devices.

3. The SCSI bus must be terminated at each end. Depending on the terminator

supplied (68-pin LVD/single-ended terminator or 68-pin HVD differential

terminator snap the wire cable clamps into place or tighten the screws to

secure the terminator.

! If the SDLT drive is the only device connected to the SCSI bus, attach the

SCSI terminator to one of the connectors on the back of the drive.

! If the SDLT drive is one of several devices connected to the SCSI bus,

and it is the last device connected to the SCSI bus, attach the SCSI
terminator to one of the connectors on the back of the drive.

CHAPTER 4: Installing Your Tape Drive

4. Align the appropriate SCSI cable to its matching connector on the drive.

Carefully connect the cable, to avoid bending or damaging the connector pins.
Check the SCSI cable and termination connections and ensure that they are
attached correctly and seated firmly.

5. Snap the wire cable clamps into place to secure the cables.

AC Power Cable

An AC power cord is supplied with each tabletop unit. Carefully inspect the power
cord and ensure that the cord is the appropriate cord for your country or region
based on the criteria below.

W

ARNING: Do not attempt to modify or use a tabletop 100–115

VAC power cord for 220–240 VAC input power.
Modifying the power cord in any way can cause
personal injury and severe equipment damage.

The AC power cord used with the tabletop unit must meet the following criteria:

• The power cord should be a minimum of 18/3 AWG, 60°C, type SJT or SVT.

• UL and CSA certified cordage rated for use at 250 VAC with a current rating

that is at least 125% of the current rating of the product.

• The AC plug must be terminated in a grounding-type male plug designed for

use in your country or region. It must also have marks showing certification
by an agency acceptable in your country or region.

• The tabletop unit cord connector must be an IEC type CEE-22 female

connector.

• The cord must be no longer than 4.5 meters (14.5 feet).

• The cord must be FCC compliant with emissions specifications.

Figure 4-8 on page 4-23 shows the AC power cord plug-end types for 115 VAC

and 220/240 VAC usage.

CHAPTER 4: Installing Your Tape Drive

Figure 4-8. AC Power Cord Connector Types

The power supply of the tabletop unit has an auto-sensing feature; no adjustment
or switch setting changes are required for different AC sources.

Refer to Figure 4-7 and Figure 4-8. Connect one end of the AC cord into the power
connector on the back of the tabletop drive; connect the other end of the cord to the
AC outlet. Upon completion, proceed to the next section to confirm the
installation.

4.5 Confirming the Installation

To confirm the installation, power on the SDLT system and the host computer.
The screens displayed at power-up contain BIOS, operating system, and SCSI
controller information. If the first screen displays host adapter and SCSI ID
information, then the system is being recognized and the installation is successful.
Refer to “Troubleshooting” on page 5-13 if the installation is not successful.

CHAPTER 4: Installing Your Tape Drive

CHAPTER 5 Using Your Tape Drive

This chapter describes how to start using your tape drive system. This includes
making a trial back-up, cleaning the tape mechanism, and various troubleshooting
information. This chapter also includes information on the LEDs and buttons on
the front panel of the system.

This chapter covers the following topics:

• “Power On Self Test” describes the sequence of activities that occur when

power is first applied to the drive.

• “Performing a Trial Back-up” describes how to backup a sample file to ensure

proper operation of the system.

• “Overwriting 320-Formatted Cartridges in a 220 Drive” describes what

happens when an SDLT 220 drive is “instructed” to overwrite the tape
cartridge using a 220-specific format.

• “Updating the Firmware” describes how to update the firmware (microcode)

that resides inside the tape drive and controls its behavior.

• “Cleaning the Tape Mechanism” describes the considerations to keep in mind

when using SDLT cleaning cartridges.

• “Front Panel Controls and LEDs” describes the functionality of the front

panel controls and LEDs.

• “Troubleshooting” lists troubleshooting tips and diagnostic tools in the event

that the tape system fails.

CHAPTER 5: Using Your Tape Drive

5.1 Power On Self Test

When power is applied to the tape system, the system performs a Power On Self
Test (POST). POST completes in approximately ten seconds. While POST is
running, the tape system responds BUSY to SCSI commands. The tape system
also responds to various SCSI messages during POST.

During this time, if a host tries to negotiate Synchronous or Wide transfers, the
tape system will negotiate to Asynchronous or Narrow. It may take longer than the
duration of POST for the drive to become ready.

Table 5-1. Indicator Pattern During POST

Stage What Can Be Observed

1 The LEDs light in a progressing pattern from left to right.
2 The red and yellow LEDs are e xtinguished a nd the green LED

flashes until POST completes.

3 If POST fails, the green and yellow LED will illuminate

steadily and the red LED will blink.

5.2 Performing a Trial Back-up

Complete the following steps to perform a trial back-up and verify the tape drive
has been correctly installed:

• Insert a cartridge. Push the cartridge completely into the system. The tape will

load automatically.

• Choose a sample file set from the host computer.

• Perform a back-up and then restore the file set. The system has been correctly

installed if the back-up is completely restored without any errors. If you
experience errors, doublecheck the drive’s configuration and setup, using the
ideas provided in “Troubleshooting” on page 5-13. After you have exhausted
all troubleshooting alternatives, contact your service representative.

• Press the Eject button to unload the cartridge. If you are unsure which button

is the Eject button, refer to Figure 5-1 on page 5-11.

CHAPTER 5: Using Your Tape Drive

NOTE: You can review specific instructions for loading a tape

cartridge in Appendix A, “SDLT I Tape Cartridge,” and

Appendix B, “DLT IV Tape Cartridge.”

5.3 Overwriting 320-Formatted Cartridges in
a220Drive

This section describes what happens when a 320-formatted cartridge is inserted
into an SDLT220 drive and the drive is “instructed” to overwritethe cartridge with
a 220 format.

NOTE: This discussion applies only to SDLT 220 drives

(firmware revision V45 and higher).

When a 320-formatted cartridge is overwritten in a 220 drive, all 320-formatted
data on that cartridge is lost forever. This includes any future attempt to space past
the 220-formatted data into the old 320-formatted data in an attempt to perform
heroic data recovery.

For more detailed information about how the tape drive responds (internally), refer
to Section A.6, “Overwriting 320-Formatted SDLT Tape Cartridges” on page A-8.

CHAPTER 5: Using Your Tape Drive

5.4 Updating the Firmware

When you need to update the firmware in a drive, you can do it either of two ways:

• Build a firmware image tape; this tape can be used in either a manual

firmware update or in a Library setting.

• Update the firmware over the SCSI bus.

Both of these approaches are described briefly in the following subsections.

NOTE: For more information about the suite of diagnostics tools

provided by Tandberg Data, refer to Tandberg Data’s web site,
www.tandberg.com. Follow the path Support >DLT Support

5.4.1 Update the Firmware Usi ng t he SCSI Bus

SDLT Update is a tool that allows you to update a drive’s firmware (using the
SCSI bus), or to create a code update (CUP/FUP) tape for an SDLT drive.

SDLT Update is available on Tandberg Data’s web site, http://www.tandberg.com.
Follow the path Support > DLTs upport and
download the SDLT Update package. For detailed instructions to use while
updating the firmware, refer to that tool’s built-in online help.

5.4.2 Making a FUP/CUP Tape

SDLT Update is a tool that allows you to update a drive’s firmware (using the
SCSI bus), or to create a code update (CUP/FUP) tape for an SDLT drive.

SDLT Update is available on Tandberg Data’s web site, http://www.tandberg.com.
Follow the path Support > DLT Support and
download the SDLT Update package. For detailed instructions about how to make
the tape, refer to that tool’s built-in online help.

5.4.3 Using a CUP/FUP Tape

Follow these steps to use a CUP/FUP tape that was previously created by you or
someone else:

CHAPTER 5: Using Your Tape Drive

1. Verify that the drive is turned on (power is applied), and the Green (Drive

Status) LED is on, but not blinking.

2. Verify that the drive’s tape opening is empty. (In other words, if any other tape

cartridge is in the drive, unload and eject it.)

3. Press and hold the Eject button for six seconds; after six seconds, the Amber

(Write Protect) LED will begin to blink.

4. Release the Eject button, then quickly press and release the Eject button again.

At this point, the Amber and Green LEDs start blinking synchronously in a
regular, rhythmic pattern. The drive is now in Firmware Upgrade mode.

You now have a “window” of one minute to insert the tape cartridge. If you do
not insert a CUP/FUP tape and the one minute time window expires, both
LEDs will stop blinking, although the Green LED will remain on (steadily
illuminated). The drive is now out of Firmware Upgrade mode and can be
used in a normal manner (once you insert a data tape cartridge). To put the
drive back in Firmware Upgrade mode, repeat steps 2, 3, and 4 above.

5. Insert the CUP/FUP tape that was previously created.

6. After you insert the tape, the Amber LED and the Green LED will change

their pattern, and start blinking in an alternating pattern. The drive is now
performing the Firmware Upgrade.

CHAPTER 5: Using Your Tape Drive

NOTE: The Firmware Upgrade will fail the microcode update

process if the firmware personalities do not match; this
will be noted in the history log, along with the reason for
the failure.

7. Wait several minutes for the update process to complete. The Amber and

Green LEDs will blink the entire time that memory is being updated.

8. When the update is complete, the drive resets itself and goes through POST.

The tape is rewound, unloaded, and ejected from the drive. SCSI status will
indicate that microcode has been updated (06h, 3F, 01).

NOTE: If the drive is mounted in a tape automation library, the

tape is not automatically ejected, but it is rewound to
BOT and unbuckled in preparation for unloading.

5.4.4 Troubleshooting the Firmware (Code) Update

Try these remedial actions if the drive’s firmware (code) update fails:

• Updating the same revision

If a Code Update is requested and the code revision being updated is the same
as the code revision already in the unit, the system updates controller code but
not servo-specific code. The steps for this type of update are the same as for a
normal update.

• Updating fails, which causes the drive to be reset; the problem can result from

any of the following circumstances:

! Cartridge contains incompatible update image.
! Cartridge does not contain an update image.
! No cartridge in the drive.

CHAPTER 5: Using Your Tape Drive

5.5 Cleaning the Tape Mechanism

This section discusses the SDLT Cleaning Tape, maintenance considerations, and
important compatibility issues you need to be aware of.

NOTE: Use the SDLT Cleaning Tape if cleaning is indicated

through your backup software or when the yellow alert
light is ON. Do not clean the drive unless the drive
specifically indicates cleaning is necessary.

5.5.1 Occasiona l Cleaning of Tape Head

SDLT drives may not require preventative cleaning, because of improvements in
the head design. The frequency of cleaning is dictated, to a large degree, by the
amount of ambient pollution and particulates in the environment. For details, refer
to “Particulate Contamination Limits” on page 3-15.

Do not clean your drive unless cleaning is indicated. Your backup software or the
yellow alert light (LED) notify you if you need to clean the drive.

C

AUTION: Never use a DLT cleaning tape in an SDLT drive; DLT

cleaning tapes are incompatible with the SDLT heads.

CHAPTER 5: Using Your Tape Drive

5.5.2 When to Use the Cleaning Tape

SDLT uses a built-in tape cleaning algorithm in conjunction with a cleaning tape.
The SDLT cleaning tape is housed in a plastic case, and is light gray in color.

A yellow LED (light) located on the front bezel of the tape drive indicates when
cleaning is needed; the location of this LED (and other front bezel LEDs) is shown
in Figure 5-1 on page 5-11.

NOTE: The tape cleaning algorithm is not used for the backward

read compatible (BRC) head; this head style does not need
cleaning.

5.5.3 Life Expectancy of the Cleaning Tape

Each SDLT Cleaning Tape is good for 20 uses. Use one of the Quantum-supplied
labels that come with the tape to keep track of the number of uses.

5.5.4 Compatibility of the Cleaning Tape

The SDLT Cleaning Tape is intended for use in SDLT drives, autoloaders and
libraries only. Alternatively stated, the Cleaning Tape only cleans the SDLT MRC
heads.

C

AUTION: Never use a DLT cleaning tape in an SDLT drive; DLT

cleaning tapes are incompatible with the SDLT heads.

CHAPTER 5: Using Your Tape Drive

5.5.5 Loading the Cleaning Tape Into a Tabletop
Drive

NOTE: To use the cleaning cartridge in an Autoloader or Library

drive, refer to your owner’s manual.

Follow these steps to load an SDLT Cleaning Tape into an SDLT tabletop drive:

1. Insert the cleaning cartridge, with the Front Slide Label Slot facing outward,

fully into the drive until the drive engages with the cartridge and begins to
take up the cleaning media. The green Drive Status LED will blink and the
cleaning cycle will begin automatically.

2. When the cleaning cycle completes, the cartridge automatically ejects from

the drive and the yellow alert LED turns off.

NOTE: On the last cleaning, the cleaning cartridge will not eject.

Use the Eject button on the front of the drive to eject the
expired cleaning cartridge and dispose of the cartridge.

3. Remove the cartridge, place it back into a plastic case, and mark the label after

each cleaning.

CHAPTER 5: Using Your Tape Drive

5.6 Front Panel Controls and LEDs

All controls and LEDs are located on the tape drive’s front panel. See Figure 5-1

on page 5-11 for details. Control and LED functionality are described in Table 5-2

and Table 5-3. Use these controls and LEDs to operate the tape system and monitor
the tape s ystem’s activities.

This section also describes the behavior of the amber-coloredLED (formerly Write
Protect) on the SDLT 320 drive. This LED is now defined as the Density Indicator,
as shown in Table 5-2.

Table 5-2. Behavior of the Amber LED When a Tape Cartridge is Loaded

Cartridge Type SDLT 220 SDLT 320*

DLT IV LEDis illuminated LED is not illuminated

SDLT I LED is not illuminated LED is illuminated for other

reasons

‡

* Firmwarerevision V45 or higher.
‡ Amber LED is used as a Density Indicator on SDLT320.

SDLT 220

CHAPTER 5: Using Your Tape Drive

SDLT 320

Figure 5-1. SDLT 220 and SDLT 320 Front Panels (A Comparison)

CHAPTER 5: Using Your Tape Drive

Table 5-3. Front Panel LED/Control Functionality

LED/Button Symbol LED Color Description

Write Protect LED
(Left on SDLT 220)

OR
Drive Density LED

(Left on SDLT 320)

Drive Status LED
(Center)

Cleaning Required
(Right)

220

Amber For the SDLT 320 drive, this LED functions as the

“Drive Density Indicator” L ED; for the SDLT 220
drive, this LED is the “Write Protect” LED.

ON
220: Tape is Write-Protected
320: Tape is 220-Formatted

OFF
220: Tape is Write-Enabled
320: Tape is 320-Formatted

Green Blinking:The drive is in use; this includes functions

such as:

• the tape is moving

• the drive is calibrating, reading, writing, or

rewinding the tape

• the tape is loading, unloading or rewinding.

ON: The drive is idle. There may or may not be a
cartridge in the tape drive.

OFF: There is no Off state.

Yellow Cleaning Required. See “Cleaning the Tape

Mechanism” on page 5-7.

Eject Button Use theEject buttonto ejectthe ta pe cartridge from the

Infrared
Communication
Port

drive. When you press the button, the drive completes
any active writing of datato the tape,then ejects the
cartridge.

Refer to the applicable tape cartridge appendix for
detailed tape cartridge handling procedures.

This infrared port, also known as the Global Storage
Link (GS Link), provides a wireless remote testing
base for customers and integrators to access system
diagnostic information. See your Quantum sales
representativefor more information.

5.7 Troubleshooting

The following subsections provide troubleshooting information that might be
helpful should the system fail its Power-On Self Text (POST).

Refer to the tape cartridge appendices in this manual (Appendix A, “SDLT I Tape

Cartridge” and Appendix B, “DLT IV Tape Cartridge” ) for complete visual

inspection instructions for SDLT and DLT cartridges.

The web site http://www.superdlttape.comincludes much valuable information
about SDLT systems.

5.7.1 POST Troubleshoo ting

CHAPTER 5: Using Your Tape Drive

Table 5-4 provides troubleshooting tips that you will find useful in the event that

your tape system fails its POST.

If, after attempting the recommended actions listed in the table, the problem still
exists or recurs, a hardware failure may be the cause. Contact your service
representative.

Table 5-4. Troubleshooting Chart

If… Then… You should…

System does not
recognize the tape
system.

System may not be configured to
recognize the SCSI ID.

SCSI ID may not be unique. Change the SCSI ID and reconfigure the

SCSI adapter parameters may not be
correct.

SCSI signal cable may be loose. Ensure SCSI cable is fully seated at each

SCSI terminatormay be loose or not
present on the bus.

Configure system to recognize the tape
system’s ID.

system. The new ID becomes effectiveat
the next power on or SCSI bus reset.

Check SCSI adapter documentation.

connector end.
Ensure correct, secure termination of bus.

CHAPTER 5: Using Your Tape Drive

Table 5-4. Troubleshooting Chart (Continued)

System does not
recognize the tape
system. (cont.)

SCSI bus may not be terminated
correctly.

If tape system is last or only device on
bus (except for adapter), make sure
terminatoris installed on tape system.

If tape system is not the last or only
device on the bus, check the cable
connections and ensure that the bus is
properly te rminated at each end.

SCSI terminator may notbe at end
of bus or more than two terminators
may be present.

Ensure that a terminator is installed at
each end of the bus. One terminator is
usually installed at the host end of the
bus.

SCSI bus may be too long. Limit bus length to ANSI SCSI s tandard

for the SCSI interface being used.

Toomany devices on the bus. Limit the number of devices on the bus

(including the SCSI adapter) to match the
limits of the interface being used.

A device may not have been turned
on and a valid SCSI ID may not
have been configured prior to the
system powering on and loading

Turn drive power on first, and then turn
on power to the system. Do this so that
the drive is properly recognized by the
system.

BIOS.

The tape system does
not power up.

Nonfatalor fatal errors
have occurred for
which the cause
cannot be determined.

No power is reaching the tape
system.

SCSI bus termination or the SCSI
bus cable connections m ay be
incorrect.

The AC power s ource grounding
may be incorrect (tabletop version).

Check the tape system’s power cable
connection at the back of the system.

Ensure the SCSI bus is terminated and
that all connections are secure. Use an
AC outletfor the tabletoptape unit on the
same AC line used by the host system.

5.7.2 Over Temperature Condition

An Overtemp condition is defined to be when the calculated Tape Path Temp =
52 degrees C. When this condition is detected, the tape is rewound, unloaded, and
ejected from the drive. (As long as the drive is not mounted in a tape automation
library, the tape is ejected.) SCSI status will indicate the drive is in the over
temperature condition.

NOTE: If the drive is mounted in a tape automation library, the

tape is not automatically ejected; for details, refer to a
separate document, Super DLT Design and Integration Guide

TD part number 432588-rev 01 or higher

CHAPTER 5: Using Your Tape Drive

CHAPTER 5: Using Your Tape Drive

CHAPTER 6 SCSI Description

This chapter covers the following topics:

• “SCSI Overview” introduces the SCSI specification.

• “SCSI-2 Commands” lists the SCSI-2 commands implemented by

SDLT 220/320.

• “SCSI-3 Commands” lists the SCSI-3 commands implemented by

SDLT 220/320.

• “Parity” defines the meaning of data parity checking.

• “Signal States” defines the meaning of SCSI signal values and SCSI IDs.

• “SCSI Signals” defines SCSI signals and provides bus timing values.

6.1 SCSI Overview

The Small Computer System Interface (SCSI) is a specification for a peripheral
bus and command set that is an ANSI standard. The standard defines an I/O wide
SCSI bus that supports up to 16 devices (15 SCSI devices and one host adapter).

ANSI defines three primary objectives for SCSI-2:

1. To provide host computers with device-independence within a class of

devices.

2. To be backward-compatible with SCSI-1 devices that support bus parity and

that meet conformance level 2 of SCSI-1.

3. To move device-dependent intelligence to the SCSI-2 devices.

CHAPTER 6: SCSI Description

Important features of SCSI-2 implementation include the following:

• Efficient peer-to-peer I/O bus with up to 15 devices

• Asynchr onous transfer rates that d epend only on d evice implementation and

c able length

• Logica l addr essing for all da ta blocks (rather than physical addr essing)

• Multiple initiators and multiple targets

• Distributed arbitration (bus c ontention logic)

• Command set enhancement.

For more details about specif ic SCSI c ommands or messages, refer to a separate
document,: Super DLT SCSI InterfaceGuide. P/N 432614, rev 01 or later.

CHAPTER 6: SCSI Description

6.2 SCSI-2 Commands

ANSI classifies SCSI commands as mandatory, optional, or vendor-specific.
The mandatory and optional SCSI-2 commands implemented for the drives are
summarized in Table 6-1.

Table 6-1. Implemented ANSI SCSI-2 Commands

Command Code Class Description

ERASE 19h Mandatory Causes part or all of the tape medium to be

erased, beginning at the current position on the

logical unit.
INQUIRY 12h Mandatory Requests that information be sent to the initiator.
LOAD UNLOAD 1Bh Optional Causes tape to move from not ready to ready.

Prior to performing the load unload, the target

ensures that all data, filemarks, and/or setmarks

shall have transferred to the tape medium.
LOCATE 2Bh Optional Causes the target to position the logical unit to

the specified block address in a specified

partition. When complete, the logical position is

before the specified position.
LOG SELECT 4Ch Optional Provides a means for the initiator to manage

statistical information maintained by the drive

about the drive. This standard defines the format

of the log pages but does not de fine the e xact

conditions and events that are logged.
LOG SENSE 4Dh Optional Provides a means for the initiator to retrieve

statistical information maintained by the drive

about the drive.
MODE SELECT (6)/(10) 15h/

55h

MODE SENSE (6)/(10) 1Ah/

5Ah

PREVENT ALLOW
MEDIUM REMOVAL

READ 08h Mandatory Requests the drive to transfer data to the initiator.

1Eh Optional Requests that the target enable or disable the

Optional Provides a means for the initiator to specify

device parameters.

Optional Provides a means for a drive to report parameters

to the initiator.

removal of the medium in the logical unit.

Medium cannot be removed if any initiator has

medium removal prevented.

READ BLOCK LIMITS 05h Mandatory Requests that the logical unit’s block length

limits capability be returned.

CHAPTER 6: SCSI Description

Table 6-1. Implemented ANSI SCSI-2 Commands (Continued)

Command Code Class Description

READBUFFER 3Ch Optional UsedinconjunctionwiththeWRITEBUFFER

command as a diagnostic function for testing

targetmemory and the integrity of the SCSI bus.

This command does not alter the medium.
READ POSITION 34h Optional Reports the current position of the logical unit

and any data blocks in the buffer.
RECEIVE DIAG

RESULTS

1Ch Optional Requests analysis da ta to be sent to the initiator

after completion of a SEND DIAGNOSTIC

command.
RELEASE UNIT 17h Mandatory Used to release a previously reserved logical

unit.
REQUEST SENSE 03h Mandatory Requests the drive to transfer sense data to the

initiator.
RESERVE UNIT 16h Mandatory Used to reserve a logical unit.
SEND DIAGNOSTIC 1Dh Mandatory Requests the drive to perform diagnostic

operations o n itself.
SPACE 11h Mandatory Provides a selection of positioning functions

(bothforward and backward) that are determined

by the code and count.
TEST UNIT READY 00h Mandatory Provides a m eans t o check if the logical unit i s

ready.
VERIFY 2Fh Optional Requests the drive to verify the data written to

the medium.
WRITE 0Ah Mandatory Requests the drive to write data transferred from

the initiator to the medium.
WRITEBUFFER 3Bh Optional UsedinconjunctionwiththeREADBUFFER

WRITE FILEMARKS 10h Mandatory Requests that the target write the specified

command as a diagnostic for testing target

memory and the integrity of the SCSI bus.

number of filemarks or setmarks to the current

position on the logical unit.

CHAPTER 6: SCSI Description

6.3 SCSI-3 Commands

ANSI classifies SCSI commands as mandatory, optional, or vendor-specific.
The mandatory and optional SCSI-3 commands implemented for the drives are
summarized in Table 6-2.

Table 6-2. Implemented ANSI SCSI-3 Commands

Command Code Class Description

PERSISTENT RESERVEIN5Eh Optional Used to retrieve from the drive information

about persistent reservations and registrations.

PERSISTENT RESERVE
OUT

RELEASE (10) 57h Mandatory Used to release a previously reserved unit.
REPORT DENS ITY

SUPPORT

REPORT DEVICE
IDENTIFIER

REPORT LUNS A0h Mandatory Requests the drive return a list of supported

RESERVE (10) 56h Mandatory Used to reserve a logical unit.
SET DEVICE

IDENTIFIER

5Fh Optional Used to register and reserve the drive through

resetsand power cycles.

44h Mandatory Requests the drive report the density codes and

some identifying information for all supported
medium formats.

A3h Optional Used to retrieve the information saved in the

drive by a SET DEVICE IDENTIFIER
command.

logical units.

A4h Optional Used to save device identifying data in the

drive.

CHAPTER 6: SCSI Description

6.4 Parity

Parity is a method of generating redundant information that can be used to detect
errors in stored or transmitted data.

Data transmitted across the SCSI interface is protected by redundant parity bits:

• One bit for the 8-bit narrow SCSI implementation

• Two bits for the 16-bit wide SCSI implementation.

These parity bits detect errors in transmission across SCSI and trigger a resend of
the bad data.

6.5 Signal States

The following paragraphs describe signal values and SCSI IDs.

6.5.1 Signal Values

All signal values are actively driven true (low voltage). Because the signal drivers
are OR-tied, the bus terminator’s bias circuitry pulls false when it is released by
the drivers at every SCSI device. If any device asserts a signal, (for example,
OR-tied signals), the signal is true. Table 6-3 lists the ANSI-specified and defined
signal sources. Any device can assert RST at any time.

Table 6-3. ANSI Signal Sources

Signals

CHAPTER 6: SCSI Description

Bus Phase BSY SEL C/D I/O

MSG REQ

BUS FREE None None None None None None
ARBITRATION All Winner None None S ID S ID
SELECTION I&T Init None Init Init Init
RESELECTION I&T Targ Targ Init Targ Targ
COMMAND Targ None Targ Init Init None
DATA IN Targ None Targ Init Targ Targ
DATA OUT Targ None Targ Init Init Init
STATUS Targ None Targ Init Targ None
MESSAGE IN Targ None T arg Init Targ None
MESSAGE OUT Targ None Targ Init Init None
All The signal is driven by all SCSI devices that are actively arbitrating.
SCSI ID Each SCSI device that is actively arbitrating asserts its unique SCSI ID bit. The other

seven (or fifteen) data bits are released. The parity bit DB(P or P1) can be released or
driven true, but is never driven false during this phase.

ACK
ATN

DB(7–0)
DB (P)

DB(15-8)
DB (P1)

I&T The signal is driven by the initiator, drive, or both, as specified in the SELECTION

and RESELECTION phase.
Init If driven, this signal is driven only by the active initiator.
None The signal is released;that is, not driven by any SCSI device. The bias circuitry of the

bus terminators pulls the signal to the false state.
Winner The signal is driven by the winning SCSI device.
Targ If the signal is driven, it is driven only by the active drive.

CHAPTER 6: SCSI Description

6.5.2 S CSI IDs

SCSI permits a maximum of 16 devices (the host adapter is considered one device)
when using wide SCSI. Each SCSI device has a unique SCSI ID assigned to it.
This SCSI ID provides an address for identifying the device on the bus. On the
drive, the SCSI ID is assigned by configuring jumpers or connecting remote
switches to the option connector. For detailed instructions about how to set the
SCSI ID, refer to “Setting the Internal Drive SCSI ID” on page 4-7.

6.6 SCSI Signals

The following subsections define SCSI signals and bus timing values.