Seagate STT8000A manual Atapi Packet Command A0h

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ATAPI Interface				Chapter 5
	Word	Description	Value	Meaning

53		Field Validity	0002h	Fields 54-58 not valid.
				Fields 64-70 valid

54-56		Current Cylinder/Heads/Sectors	0000h	Unsupported

57-58		Current Capacity	0000h	Unsupported

59		Reserved	0000h	—

60-61		User Addressable Sectors	0000h	Unsupported

62		Single Word DMA Mode	0407h	Selected DMA mode 2 (Upper Byte),
				DMA modes 2,1,0 Supported.

63		Multi Word DMA Mode	0407h	Selected DMA mode 2 (Upper Byte)
				DMA modes 2, 1, 0 supported.

64		Enhanced PIO Mode	0003h	PIO Mode 3 and 4 Supported

65		Minimum Multi Word DMA Cycle Time	0078h	Mode 2 (120 nanoseconds)

66		Recommended Multi Word DMA Cycle	0078h	Mode 2 (120 nanoseconds)
		Time

67		Minimum PIO Cycle Time w/o IORDY	0078h	Mode 4 (120 nanoseconds)

68		Minimum PIO Cycle Time with IORDY	0078h	Mode 4 (120 nanoseconds)

69-255		Reserved/Vendor Unique	0000h	—

ATAPI Packet Command (A0h)

Before issuing the ATAPI Packet command, the host writes to the Byte Count register (high and low) the maximum/preferred number of bytes to be transferred in a single PIO DRQ. For Data Transfer commands (READ and WRITE), this value is assumed to be greater than or equal to 512 and is ignored.

ATAPI Soft Reset (08h)

The ATAPI Soft Reset command performs a complete microprocessor reset. Current physical and logical position is lost, and if a tape is present, a LOAD sequence is performed, resulting in a Ready at BOP0 condition (with Unit Attn).

The DSC is set to 1 before the BSY bit is cleared.

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 Drive overview IntroductionSTT8000A internal drive without mounting brackets Features Minicartridge technology overview Typical system configurationsFlash Eeprom SoftwareReferences Chapter Title Description About this manualSpecifications Physical specificationsOverview STT8000A 3.5-Inch mount general dimensions Specification Measurement Power specificationsFeature Specification Performance specificationsEnvironmental requirements Specification Operational Non-operationalReliability Mean-Time-Between FailuresMean-Time-To-Repair Tape capacities and formats Recommended tapesTUV & IEC-RHEINLAND Regulatory complianceIntroduction InstallationBefore you begin Handling guidelinesJumper block and jumper settings Setting jumpersAligning the drive in the computer Installing the driveMounting dimensions Mounting holes on internal drive without mounting brackets Pin Assignment Description Source ATA-2 Interface pin assignmentsREQ Chapter Installation Front panel LED Drive operation and maintenanceLoading and unloading cartridges Using Travan cartridgesTravan cartridge write-protect switch-locked position Setting the write-protect switchLoading revised firmware via Seagate firmware cartridge Care and maintenance of the drive and cartridges Caring for tape cartridgesCaring for the drive Capstan Tape Head Troubleshooting Chapter ATA-2 Signals Atapi interfaceATA-2 Interface Abrt ATA registersBits Mnemonic Description Previous Cmd Int Reason Supported ATA CommandsFeature Number Set Feature Commands Atapi Identify Device A1h Atapi Packet Command A0h DSC Atapi interfaceErase command Bit Byte Inquiry commandLoad/Unload command Locate command Log Select command Log Sense command Following table presents the Error Counter Page layout Error Counter Page ReadFollowing table presents the Tape Capacity Page layout Tape Capacity Page CodeMode Select command Code Description Mode Sense commandMode Block Descriptor Mode Parameter HeaderMode Capabilities and Mechanical Status Mode Medium PartitionMode Tape Parameters Read command Following table describes the Read Position layout Read Position commandChapter 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 Tape format Tape partitioningTrack positions Track numbering Track formatFrames General track layout Blocks Tape reference servo patternRandomization Write equalizationChapter Tape format Theory of operations Block diagramMechanics Capstan drive motor assemblyCartridge load mechanism ChassisSensors and switches Control circuitsHead design Travan minicartridge Media-Travan minicartridgesGlossary Appendix a Glossary Glossary Appendix a Glossary Acronyms and abbreviations Acronyms and measurementsLSI Measure Meaning Units of measurementAppendix B Acronyms and Measurements