Tandberg Data VXA-320 (VXA-3) manual Scsi Command Protocol, Command SET

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CHAPTER 6 COMMUNICATION INTERFACE AND COMMAND PROTOCOL

SCSI COMMAND PROTOCOL

This section provides an overview of the SCSI command protocol supported by the VXA-320 (VXA-3) tape drive.

COMMAND SET

Table 6-6lists and briefly describes the command set supported by the tape drive.

Table 6-6SCSI command set

 

 

t

 

 

 

 

Command

Operation

Description

 

Code

 

ERASE

19h

Causes the tape drive to erase all data from the current location to

 

 

the end of partition.

 

 

 

INQUIRY

12h

Requests that information about tape drive parameters be sent to the

 

 

initiator.

 

 

 

LOAD/UNLOAD

1Bh

Causes the tape drive to load or unload a cartridge.

 

 

 

LOCATE

2Bh

Positions the tape at a specified logical position or changes partitions.

 

 

(Typically, this position is determined by data that was obtained

 

 

through a previous READ POSITION command.)

 

 

 

LOG SELECT

4Ch

Manages a set of internal counters regarding read and write error

 

 

recovery operations and amounts of data compressed. The initiator

 

 

can set threshold and cumulative values for the counters or reset the

 

 

counters.

 

 

 

LOG SENSE

4Dh

Returns the values of the counters managed by the LOG SELECT

 

 

command.

 

 

 

MODE SELECT

15h

Allows you to specify medium, logical unit, and device parameters.

 

 

 

MODE SENSE

1Ah

Enables the tape drive to report medium, logical unit, or device

 

 

parameters.

 

 

 

PREVENT/ALLOW

1Eh

Allows or disallows the removal of the cartridge from the tape drive.

MEDIUM REMOVAL

 

 

 

 

 

READ

08h

Transfers one or more bytes or blocks of data from the tape to the

 

 

initiator.

 

 

 

READ BLOCK LIMITS

05h

Requests that the tape drive return data identifying the maximum

 

 

and minimum logical block lengths supported.

 

 

 

READ BUFFER

3Ch

Creates a diagnostic listing of the tape drive’s current state or the

 

 

contents of the tape drive’s data buffer.

 

 

 

READ POSITION

34h

Reports the tape drive’s current logical position, but does not cause

 

 

tape motion to occur. Used in conjunction with the LOCATE

 

 

command.

 

 

 

44

 

PRODUCT MANUAL

433689-01

 

 

 

 

 

 

 

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Contents Product Manual VXA-320 VXA-3 Tape Drive433689-01 III To obtain general information To order supplies and accessoriesTo return equipment for service RMA Request To obtain technical supportOperation, troubleshooting, maintenance, and service HOW to USE this ManualFirst-time installation Specifications, standards, and termsRelated Publications VXA-320 PublicationsStandards Publications Conventions Used in this ManualContents Service and Maintenance Glossary Index 433689-01 Figures Xii 21Shipping carton weights and dimensions 1Service Notification error recovery procedures1LED states Xiv Tape Drive Models and Interfaces FeaturesData storage Components Front Panel ComponentsBack Panel Components Internal Tape Drive Scsi ID Jumper Block Scsi model only Used to set the Scsi IDBack Panel Components External Tape Drive 5External tape drive back-panel componentsTape Drive Labels 6Top-panel label Scsi tape drive433689-01 Installing the Tape Drive InstallationUnpacking the Tape Drive Installing the Internal Scsi Tape Drive Before You BeginSet the Scsi ID and connect the Scsi cable Tape drive2SCSI ID settings Pin 433689-01 5Screw mounting configurations internal model Side mountingInstalling the External Scsi Tape Drive 6External Scsi tape drive back-panel componentsInstall the Tape Drive 7Terminating the Scsi bus external model Checking the Installation Integrating the Tape Drive Application instructs you to do soOperation 1Internal tape drive front-panel componentsService Notification Monitoring the LedsBroken tape Flashing Off Green Format recoverye OffBoot Block Modeg Tape pathfLoading a Cartridge Using Vxatape CartridgesSetting the WRITE-PROTECT Switch Unloading a CartridgeDetermining When to Clean the Tape Drive Cleaning the Tape DriveStoring the Cartridges Other cleaning methods may void the tape drive’s warranty Resetting the Tape DriveUsing a Cleaning Cartridge LED 2 flashes green and amberResolving Problems TroubleshootingTape Drive will not Accept a Cartridge LED 4 is Flashing Orange Tape Drive will not Eject a Cartridge Service Notification LED Code Appears Suggested Recovery ProcedureBackup Application is Reporting AN Error Failure to communicate with the tape driveBackup Application configuration issues Failure by the tape drive to write or read dataGetting Started Important First Step Troubleshooting with VxatoolUpdating Firmware Capturing a Diagnostic LOG Performing a WRITE/READ TestVXA-320 Tape Drive Information Gathering Troubleshooting Information for Technical SupportScsi BUS Information Tape Drive Diagnostic Information Backup Application InformationOperating System Information 433689-01 Returning the Tape Drive for Service Service and MaintenanceSite atvprovides more information Obtaining a Diagnostic Listing Upgrading FirmwareCommunication Interface Command Protocol Communication Interface Versus Command ProtocolScsi BUS Phases Scsi Communication InterfaceScsi Message System Message Hex DescriptionScsi Interface Requirements Scsi Cable Requirements Specification RequirementTerminator power Internal Tape Drive+ACK Scsi Connector Requirements+ATN +MSGExternal Tape Drive Connector typeScsi Terminator Requirements Maximum length a Meters 39 feet bScsi Command Protocol Command SETReceive Sense Keys Status BytesStatus byte Hex Description Sense key Hex DescriptionBlank tape during a read, space, or locate operation Drive during Command or Data Out phaseData cartridge. The write operation is not performed Aborted433689-01 Specifications Data CapacitiesRead and Write Specifications Performance SpecificationsData Transfer Rates Reliability Specifications Tape Speed and Access TimeSize and Weight Specification Internal Tape Drive External Tape DrivePower Connector Pin Assignments Power SpecificationsPin Assignment Power Consumption Power average Power ConsumptionPower +5 Volts +12 Volts DC VoltagesPower Supply Acoustic NoiseInternal Tape Drive Operating Temperature and Humidity Environmental SpecificationsEnvironmental Conditions for the Tape Drive Point Temperatures Humidity External Tape Drive Operating Temperature and Humidity Particulate Contamination Limits Shock SpecificationsAir Flow/Cooling Requirements Particle Size Number of ParticlesVibration applied during shipping in original packaging Vibration SpecificationsSpecification Swept sine applied during non-operationcand operatingdShipping Cartons Packaging and Shipping SpecificationsCarton Weight Dimensions Single Pack Multipack 10 Internal Tape DrivesPackaging Materials Safety and Regulatory ComplianceTUV Product Service Underwriters LaboratoryUnited States FCC Declaration of Conformity Canadian VerificationAustralia and NEW Zealand European CommunityJapan TaiwanGlossary 433689-01 Glossary 433689-01 Glossary 433689-01 Index FCC52 to 56 to Scsi ID 56 to Index Product Manual

VXA-320 (VXA-3) specifications

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