Seagate STT8000A manual Feature Number Set Feature Commands

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ATAPI Interface

Chapter 5

Set Features (EFh)

If an unsupported feature is selected, the command is aborted. Otherwise, the indicated parameter is set. The following list indicates the supported features:

Feature Number	Set Feature Commands
03h	Set Transfer Mode from Sector Count register
66h	Disable reverting to power-on defaults (no-op)
CCh	Enable reverting to power-on defaults (no-op)

Set Transfer Mode Feature

If the Set Transfer Mode feature (03h) is received, the Sector Count (ATAPI Interrupt Reason) register is used to set the transfer mode based on the following table. Any transfer modes not listed in the table cause the command to be aborted.

Sector	Transfer Mode
00h	PIO Transfer Mode 4 (default)
01h	PIO Transfer Mode 2 (explicit IORDY disable)
08h	PIO Transfer Mode 0
09h	PIO Transfer Mode 1
0Ah	PIO Transfer Mode 2
0Bh	PIO Transfer Mode 3
0Ch	PIO Transfer Mode4
10h	Single Word DMA Mode 0
11h	Single Word DMA Mode 1
12h	Single Word DMA Mode 2
20h	Multi-word DMA Mode 0
21h	Multi-word DMA Mode 1
22h	Multi-word DMA Mode 2

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 configurationsSoftware Flash EepromReferences Chapter Title Description About this manualPhysical specifications SpecificationsOverview STT8000A 3.5-Inch mount general dimensions Specification Measurement Power specificationsFeature Specification Performance specificationsEnvironmental requirements Specification Operational Non-operationalMean-Time-Between Failures ReliabilityMean-Time-To-Repair Tape capacities and formats Recommended tapesTUV & IEC-RHEINLAND Regulatory complianceHandling guidelines InstallationIntroduction Before you beginJumper 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 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 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 partitioning Tape formatTrack positions Track format Track numberingFrames General track layout Blocks Tape reference servo patternRandomization Write equalizationChapter Tape format Theory of operations Block diagramChassis Capstan drive motor assemblyMechanics Cartridge load mechanismControl circuits Sensors and switchesHead 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