Seagate ST380215ACE, ST3160215SCE, ST3160215ACE, ST380215SCE manual Set Features command, 0CH

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4.5Set 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
10H	Enable use of SATA features
55H	Disable read look-ahead (read cache) feature (SATA only)
82H	Disable write cache
90H	Disable use of SATA features (SATA only)
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.

32	DB35.3 Series SATA/PATA Product Manual, Rev. F

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Contents

DB35.3 Series 80-160GB ST3160215SCEST3160215ACE ST380215SCEST380215ACEPage Contents DB35.3 Series SATA/PATA Product Manual, Rev. F List of Figures DB35.3 Series SATA/PATA Product Manual, Rev. F Pata models IntroductionSata models About the Serial ATA interface Drive specifications Specification summary tableDrive specifications summary for 160 and 80 Gbyte models DB35.3 Series SATA/PATA Product Manual, Rev. F Formatted capacity LBA modeDefault logical geometry Recording and interface technologySeek time Physical characteristicsDrive specification Start/stop timesSpinup power Power specificationsPower consumption Seek modeVoltage tolerance Representative current profileConducted noise Idle mode Power-management modesActive mode Sleep modeWet bulb temperature Environmental specifications Case temperatureTemperature gradient Humidity Relative humidityAcoustics Operating vibrationNonoperating vibration Fluid Dynamic Bearing FDB motor acousticsRadio frequency environments Electromagnetic immunityReliability Performance Reference Test Description Level StandardAgency certification Page China Restriction of Hazardous Substances RoHS Directive Environmental protectionCorrosive environment超出 Handling, mounting and configuring the drive Handling and static discharge precautionsMounting the drive Breather filter hole precautions Breather filter hole locationHow to connect the Sata cables How to configure and attach Serial ATA Sata drivesHow to configure the drive How to configure the drive as a master or slave How to configure and attach the Parrallel ATA Pata drivesHow to set the jumper settings How to use the cable-select optionUltra ATA cable connectors Ultra ATA/100 cableRefer to InterfaceInterface Serial ATA Sata interface Serial ATA connector pin definitionsSignal Pin Function DefinitionPage ATA interface signals and connector pins Parallel ATA Pata InterfaceCommand name Command code in hex Supported ATA commandsSupported ATA commands F9H Sata onlyIdentify Device command Word Description ValueXx07H Bit Word 93 Pata only Description if bit is set to Bit WordBit Word Set Features command 0CHS.M.A.R.T. commands Code in features Register A.R.T. commandDB35.3 Series SATA/PATA Product Manual, Rev. F Presales Support Seagate Technology support servicesInternet Technical SupportData Recovery Services Call Center Toll-free Direct dial Warranty ServiceData Recovery Services Authorized Service Centers Index Page Sata DB35.3 Series SATA/PATA Product Manual, Rev. F Page Seagate Technology LLC