Seagate ST680712DEG manual Set Features command, Features register values, Feature Description

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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:

Table 10:	Features register values

Feature	Description

02H	Enable Write Cache.
03H	Used for Set transfer mode Command.
03H
	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
	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
05H	Enable advanced power management
55H	Disable read look-ahead (read cache) feature.
66H	Disable Power On Reset (POR) establishment of defaults at Soft Reset.
82H	Disable write cache.
85H	Disable Advanced Power Management
AAH	Enable read look-ahead (read cache) feature.
CCH	Enable Power On Reset (POR) establishment of defaults at soft reset

ST1.3 Series Product Manual, Rev. C

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Contents Rev. C ST1.3 SeriesRevision status summary sheet Contents ST1.3 Series Product Manual, Rev. C List of Figures ST1.3 Series Product Manual, Rev. C Introduction ST1.3 Series IDE interface ZIF connector disc driveDisclaimer Handling precautionsDrive care Power, access times and acoustics Drive specificationsSpecifications Gs 0 to peak, 10-500 Hz @ 0.5 oct/min sweep rate LBA mode Default logical geometryFormatted capacity Model Cylinders Read/write heads Sectors per trackTechnology Specification Physical characteristicsRecording and interface technology Time to readyPower specifications Typical current profile DC powerVoltage tolerance Voltage tolerance including noise Conducted noiseActive mode Power-management modesPerformance idle mode Standby/Sleep modeEnvironmental specifications Operating shock ShockNonoperating shock VibrationOperating random vibration Operating sweep sine vibrationOperating random vibration profile Nonoperating sweep sine vibrationNonoperating random vibration profile Nonoperating random vibrationCorrosive environment Electromagnetic immunity AcousticsDrive level acoustics Electromagnetic immunityReliability Measurement type SpecificationAgency certification Safety certificationElectromagnetic compatibility Korean RRLFCC verification China Restriction of Hazardous Substances RoHS DirectivePage ST1.3 Series Product Manual, Rev. C Handling and static discharge precautions Configuring and mounting the driveSeries Proper Handling example Drive installation ST1.3 Series Product Manual, Rev. C ST1.3 Series Area for Protective Mounting Mounting considerationsWay ZIF IDE interface connector signals Connector interface signals and connector pinsInterface description Iord Supported ATA commands Supported commands Word ATA specification Value Identify Device commandXxA5H Description if bit is set to Bit Features register values Set Features commandFeature Description ST1.3 Series Product Manual, Rev. C Internet Seagate Technology support servicesPresales Support Technical SupportData Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call Center Toll-free Direct dial Publication feedback survey ST1.3 Series Product Manual, Rev. C Index Page Page ST1.3 Series Product Manual, Rev. C Page Seagate Technology LLC