Seagate ST9200011FS, ST950011FS, ST9100011FS manual Set Features command values

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4.3.2Set Features command

This command controls the implementation of various features that the drive supports. When the drive receives this command, it sets BSY, checks the contents of the Features register, clears BSY and generates an inter- rupt. If the value in the register does not represent a feature that the drive supports, the command is aborted. Power-on default has the read look-ahead and write caching features enabled. The acceptable values for the Features register are defined as follows:

Table 8: Set Features command values

02H

Enable write cache (default).

03H

Set transfer mode (based on value in Sector Count register).

 

Sector Count register values:

 

00H

Set PIO mode to default (PIO mode 2).

 

01H

Set PIO mode to default and disable IORDY (PIO mode 2).

 

08H

PIO mode 0

 

09H

PIO mode 1

 

0AH

PIO mode 2

 

0BH

PIO mode 3

 

0CH

PIO mode 4 (default)

 

20H

Multiword DMA mode 0

 

21H

Multiword DMA mode 1

 

22H

Multiword DMA mode 2

 

40H

Ultra DMA mode 0

 

41H

Ultra DMA mode 1

 

42H

Ultra DMA mode 2

 

43H

Ultra DMA mode 3

 

44H

Ultra DMA mode 4

 

45H

Ultra DMA mode 5

 

46H

Ultra DMA mode 6

10H

Enable use of SATA features

 

02H

DMA Setup FIS Auto-Activate optimization

 

03H

Device-initiated interface power state transitions

 

06H

Software Settings Preservation

55H

Disable read look-ahead (read cache) feature

66H

Disable reverting to power-on defaults

82H

Disable write cache

90H

Disable use of SATA features

 

02H

DMA Setup FIS Auto-Activate optimization

 

03H

Device-initiated interface power state transitions

 

06H

Software Settings Preservation

AAH

Enable read look-ahead (read cache) feature (default).

CCH

Enable reverting to power-on defaults

Note. At power-on, or after a hardware or software reset, the default values of the features are as indicated above.

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Pulsar Product Manual, Rev. A

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Contents PulsarTM ST9200011FS ST9100011FS ST950011FSRevision history Revision DateContents Pulsar Product Manual, Rev. a List of Figures Page Introduction About the Serial ATA interface Specification summary tables Drive specifications summary for 200, 100 and 50 GB modelsPulsar Product Manual, Rev. a Formatted capacity Default logical geometry for ATA based systemsPerformance, Recording and interface technology Physical characteristics PerformanceTypical access times µs Read Write Access timeTime to Ready Power specifications 200GB DC power requirements 100GB DC power requirements 50GB DC power requirements Conducted noise Typical current profilesVoltage tolerance Environmental specifications Electromagnetic immunity VibrationOperating vibration Nonoperating vibrationReliability specifications ReliabilityAgency certification Environmental protection ChassisCorrosive environment Configuring and mounting the drive Handling and static-discharge precautionsConfiguring the drive Serial ATA cables and connectorsMounting dimensions-top, side and end view Drive mountingCooling Air flowSerial ATA Sata interface Hot-Plug compatibilitySerial ATA device plug connector pin definitions Serial ATA connector pin definitionsSignal Pin Function DefinitionSupported ATA commands Supported ATA commandsCommand name Command code in hex C6H Identify Device command Word Description ValueXxxxh Ffffh Description if bit is set to Bit Word Bit WordDevice supports Software Settings Preservation Media serial number is supported Write-Read-Verify feature set is supported Set Features command Set Features command valuesA.R.T. commands 3 S.M.A.R.T. commandsCode in features register A.R.T. command Pulsar Product Manual, Rev. a Warranty Support Direct.seagate.com Spp.seagate.com WebTechnical Support Warranty Service Data Recovery Services Authorized Service CentersData Recovery Services Call Center Toll-free Direct dial Presales SupportIndex Page Page Pulsar Product Manual, Rev. a Page Disc Drive, Scotts Valley, California 95066-4544, USA