Seagate ST3200827ACE, ST3120213ACE, ST3160212ACE, ST3250824ACE manual Set Features command, 0CH

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4.1.3Set 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:

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
55H	Disable read look-ahead (read cache) feature.
82H	Disable write cache.
AAH	Enable read look-ahead (read cache) feature (default).
F1H	Report full capacity available

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

36	DB35 Series 7200.2 Product Manual, Rev. C

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Contents DB35 Series Revision status summary sheet Contents DB35 Series 7200.2 Product Manual, Rev. C List of Figures DB35 Series 7200.2 Product Manual, Rev. C Introduction DB35 Series 7200.2 Product Manual, Rev. C Drive specifications Specification summary tableDrive specifications for 500 and 400 Gbyte models Drive specification ST3500841ACE ST3400833ACEFollowing web Drive specifications for 300, 250, and 200 Gbyte models Drive specification ST3300822ACE ST3250824ACE ST3200827ACEDB35 Series 7200.2 Product Manual, Rev. C Drive specifications for 160, 120, and 80 Gbyte models Drive specification ST3160212ACE ST3120213ACE ST3802110ACEAccess the following web Formatted capacity Default logical geometryLBA mode Recording and interface technologyDB35 Series 7200.2 Product Manual, Rev. C Physical characteristics Seek timeStart/stop times Power specifications Typical current profile Conducted noiseVoltage tolerance Idle mode Power-management modesActive mode Sleep modeEnvironmental specifications Vibration AcousticsNonoperating shock Operating vibrationElectromagnetic immunity ReliabilityRadio frequency environments Electromagnetic compatibility Safety certificationAgency certification Korean RRLEnvironmental protection FCC verificationEuropean Union Restriction of Hazardous Substances RoHS Corrosive environment DB35 Series 7200.2 Product Manual, Rev. C Configuring and mounting the drive Handling and static discharge precautionsBreather filter hole precautions Breather filter hole locationDrive as master with a non-ATA-compatible slave Jumper settingsMaster/slave configuration Cable-select optionDrive mounting Ultra ATA/100 cableMounting dimensions-top, side and end view DB35 Series 7200.2 Product Manual, Rev. C ATA interface signals and connector pins ATA interfaceSupported ATA commands Command name Command code in hexF6H Write Sectors Without Retries 31H Write Sectors Extended 34H Identify Device command Word Description ValueXx07H Description if bit is set to Bit Word Set Features command 0CH4 S.M.A.R.T. commands Code in features Register A.R.T. commandDB35 Series 7200.2 Product Manual, Rev. C Internet MySeagate Spp.seagate.com Seagate Technology support servicesWarranty Service Presales SupportData Recovery Services Authorized Service Centers Data Recovery ServicesFAX services-All Europe toll call Call center Presales and Technical Support Warranty ServiceToll-free support numbers Asia/Pacific support services Publication feedback survey DB35 Series 7200.2 Product Manual, Rev. C Index NumericsPage Page DB35 Series 7200.2 Product Manual, Rev. C Page Seagate Technology LLC

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