Seagate ST360019A manual Set Features command, 0CH

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Bit

Word 93

131 = 80-conductor cable detected, CBLID above VIH 0 = 40-conductor cable detected, CBLID below VIL

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.

28	U Series 9 Product Manual, Rev. D

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Contents Series Page Series Page Revision status summary sheet Page Contents Series 9 Product Manual, Rev. D List of Figures Viii Series 9 Product Manual, Rev. D Introduction Series 9 Product Manual, Rev. D Drive specifications Specification summary tableSeries 9 Product Manual, Rev. D Formatted capacity Default logical geometryLBA mode Physical organizationSeek time Physical characteristicsPower specifications Start/stop timesSeek mode Power consumptionSpinup power Read/write power and currentTypical current profile Typical 5V startup and operation current profileIdle mode Power-management modesActive mode Sleep modeEnvironmental specifications Acoustics Fluid Dynamic Bearing FDB motor acoustics Electromagnetic immunityReliability Agency certification Page 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 Series 9 Product Manual, Rev. D ATA interface signals and connector pins ATA interfaceO pins and supported ATA signals Supported ATA commands Command name Command code in hex ATA-standard commandsCommand name Command code in hex 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 A.R.T. command RegisterSeries 9 Product Manual, Rev. D MySeagate Seagate Technology support servicesInternet Reseller MarketplaceSeagate Online Store Warranty ServiceAuthorized Service Centers Presales SupportUSA/Canada/Latin America Support Services European Support Services FAX Services-All European CountriesAsia/Pacific Support Services Series 9 Product Manual, Rev. D Index NumericsPage Page Series 9 Product Manual, Rev. D Page Seagate Technology LLC