Seagate STT8000A manual Locate command

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Chapter 5ATAPI Interface

Locate command

Bit	7	6	5		4		3	2	1	0
Byte

0					Operation code (2Bh)

1				Reserved					CP	Reserved

2						Reserved

3	(MSB)

4					Logical Block Address

5

6										(LSB)

7						Reserved

8						Partition

9						Reserved

If the Change Partition (CP) bit is set, the drive first changes to the specified partition, then attempts to locate before the specified logical block. (All addresses are interpreted as logical.) A locate to Block 0 (in any partition) is treated like a rewind (to BOP)and does not start a read-ahead. Depending on the exact sequence of commands, LOCATE to Block 0 might or might not report a Blank Check error.

The DSC bit is reset (0) after this command is accepted and is set (1) when completed. REQUEST SENSE can then be used to verify successful command completion.

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STT8000A Product Manual

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Contents STT8000A Atapi Minicartridge Drive Product Manual Page FCC Notice Important Information About This Manual Table of Contents Atapi interface Tape format Glossary Acronyms and measurements Introduction Drive overviewSTT8000A internal drive without mounting brackets Features Typical system configurations Minicartridge technology overviewReferences Flash EepromSoftware About this manual Chapter Title DescriptionOverview SpecificationsPhysical specifications STT8000A 3.5-Inch mount general dimensions Power specifications Specification MeasurementPerformance specifications Feature SpecificationSpecification Operational Non-operational Environmental requirementsMean-Time-To-Repair ReliabilityMean-Time-Between Failures Recommended tapes Tape capacities and formatsRegulatory compliance TUV & IEC-RHEINLANDBefore you begin InstallationIntroduction Handling guidelinesSetting jumpers Jumper block and jumper settingsInstalling the drive Aligning the drive in the computerMounting dimensions Mounting holes on internal drive without mounting brackets ATA-2 Interface pin assignments Pin Assignment Description SourceREQ Chapter Installation Drive operation and maintenance Front panel LEDUsing Travan cartridges Loading and unloading cartridgesSetting the write-protect switch Travan cartridge write-protect switch-locked positionLoading revised firmware via Seagate firmware cartridge Caring for the drive Care and maintenance of the drive and cartridgesCaring for tape cartridges Capstan Tape Head Troubleshooting Chapter ATA-2 Interface ATA-2 SignalsAtapi interface ATA registers AbrtBits Mnemonic Description Supported ATA Commands Previous Cmd Int ReasonFeature Number Set Feature Commands Atapi Identify Device A1h Atapi Packet Command A0h Atapi interface DSCErase command Inquiry command Bit ByteLoad/Unload command Locate command Log Select command Log Sense command Error Counter Page Read Following table presents the Error Counter Page layoutTape Capacity Page Code Following table presents the Tape Capacity Page layoutMode Select command Mode Sense command Code DescriptionMode Parameter Header Mode Block DescriptorMode Medium Partition Mode Capabilities and Mechanical StatusMode Tape Parameters Read command Read Position command Following table describes the Read Position layoutChapter Atapi Interface Request Sense command Following table describes the Request Sense layout Rewind command Space command Test Unit Ready command Write command Write Filemark command Write Buffer download microcode command Track positions Tape formatTape partitioning Frames Track numberingTrack format General track layout Tape reference servo pattern BlocksWrite equalization RandomizationChapter Tape format Block diagram Theory of operationsCartridge load mechanism Capstan drive motor assemblyMechanics ChassisHead design Sensors and switchesControl circuits Media-Travan minicartridges Travan minicartridgeGlossary Appendix a Glossary Glossary Appendix a Glossary Acronyms and measurements Acronyms and abbreviationsLSI Units of measurement Measure MeaningAppendix B Acronyms and Measurements