Seagate STT8000A manual Following table describes the Request Sense layout

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Chapter 5

ATAPI Interface

The following table describes the REQUEST SENSE layout.

Byte	Description	Value	Meaning

0	Valid, Error Code	70h,71h	80h = Information Field Valid
			+ 70h = Current Errors
			or 71h = Deferred Errors

1	Reserved (Segment Number)	00	—

2	Filemark, EOM, ILI, Sense Key	NN	80h = Filemark
			+ 40h = EOM
			+ 20h = ILI
			+ Sense Key

3-6	Information	NNNNNNNN	Transfer Residue or
			Unwritten Blocks + Filemarks

7	Additional Sense Length	0Ah	10 bytes following

8-11	Command Specific Information	00h	Not Supported

12	Additional Sense Code (ASC)	NN

13	Additional Sense Code	NN
	Qualifier (ASCQ)

14	Field Replaceable Unit Code	00h	Not Supported

15	SKSV + Sense Key Specific	00h	Not Supported

16,17	Sense Key Specific	0000h	Not Supported

18,19	Pad	0000h	Pad to 4-byte boundary

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STT8000A Product Manual

Image 64

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 overviewSoftware Flash EepromReferences About this manual Chapter Title DescriptionPhysical specifications SpecificationsOverview STT8000A 3.5-Inch mount general dimensions Power specifications Specification MeasurementPerformance specifications Feature SpecificationSpecification Operational Non-operational Environmental requirementsMean-Time-Between Failures ReliabilityMean-Time-To-Repair Recommended tapes Tape capacities and formatsRegulatory compliance TUV & IEC-RHEINLANDInstallation IntroductionBefore you begin 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 tape cartridges Care and maintenance of the drive and cartridgesCaring for the drive Capstan Tape Head Troubleshooting Chapter Atapi interface ATA-2 SignalsATA-2 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 Tape partitioning Tape formatTrack positions Track format Track numberingFrames General track layout Tape reference servo pattern BlocksWrite equalization RandomizationChapter Tape format Block diagram Theory of operationsCapstan drive motor assembly MechanicsCartridge load mechanism ChassisControl circuits Sensors and switchesHead design 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