Seagate ST3500320SV, ST31000340SV, ST3250310SV, ST3750330SV 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
55H	Disable read look-ahead (read cache) feature.
82H	Disable write cache
90H	Disable use of SATA features
AAH	Enable read look-ahead (read cache) feature (default).

SV35.3 Series Serial ATA Product Manual, Rev. B

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Contents ST31000340SV ST3750330SV ST3500320SV ST3250310SV SV35.3 Series Serial ATARevision Date Revision historyContents SV35.3 Series Serial ATA Product Manual, Rev. B List of Figures Page Introduction About the Serial ATA interface Specification summary tables Drive specificationsDrive specification ST31000340SV ST3750330SV ST3500320SV System will display the warranty information for your drive Drive specification ST3250310SV Drive specifications summary for 250 Gbyte modelsTem will display the warranty information for your drive Cylinders Read/write heads Sectors per track Default logical geometryLBA mode Formatted capacityModels ST31000340SV, ST3750330SV & ST3500320SV ST3250310SV Physical characteristicsDrive specification Recording and interface technologyTB models GB models Seek timeStart/stop times Typical seek times msec Read WritePower specifications DC power requirements Voltage tolerance Conducted noiseSleep mode Power-management modesActive mode Idle modeEnvironmental specifications Nonoperating shock 1 disc models ShockOperating shock Nonoperating shock 4, 3 and 2 disc modelsRadio frequency environments AcousticsElectromagnetic immunity Fluid Dynamic Bearing FDB motor acousticsReliability Agency certification China Restriction of Hazardous Substances RoHS Directive Environmental protectionCorrosive environment SV35.3 Series Serial ATA Product Manual, Rev. B Handling and static-discharge precautions Configuring and mounting the driveSerial ATA cables and connectors Configuring the driveDrive mounting Mounting dimensions-top, side and end viewSV35.3 Series Serial ATA Product Manual, Rev. B Hot-Plug compatibility Serial ATA Sata interfacePower Serial ATA device plug connector pin definitionsSerial ATA connector pin definitions SignalPage Supported ATA commands Supported ATA commandsCommand name Command code in hex F6H E8H Word Description Value Identify Device commandXxxxH Xx3FH Bit Word Description if bit is set to Bit WordSet Features command values Set Features commandF1 H A.R.T. commands 3 S.M.A.R.T. commandsCode in features register A.R.T. command SV35.3 Series Serial ATA Product Manual, Rev. B Presales Support InternetTechnical Support Data Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call Center Toll-free Direct dialFAX Index ITE Page SV35.3 Series Serial ATA Product Manual, Rev. B Page Seagate Technology LLC