Maxtor 52049U4, 51024U2, 51536U3, 53073U6, 54098U8 SetFeatureCommands, Value Description

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INTERFACE COMMANDS

SetFeatureCommands

Set Features Mode

Enables or disables features supported by the drive. When the drive receives this command it:

1.Sets BSY,

2.Checks the contents of the Features register,

3.Clears BSY and

4.Generates an interrupt.

If the value of the register is not a feature supported by the drive, the command is aborted. The acceptable values in the Features register are defined as follows:

VALUE	DESCRIPTION

02h*	Enabled write cache

03h	Set transfer mode based on value in Sector Count register

44h	Length of data appended on Read Long/Write Long commands specified in the
	Identify Device information

55h	Disable read look-ahead feature

66h*	Disable reverting to power-on defaults

82h	Disable write cache

AAh*	Enable read look-ahead feature

BBh*	4 bytes of Maxtor specific data appended on Read Long/Write Long commands

CCh	Enable reverting to power-on defaults

* Enabled at power up by default.

7 – 6

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Contents DiamondMax Plus Before You Begin U T I O NContents Handling and Installation Product SpecificationsDiamondmax Plus 40 Product Manual AT Interface Description Interface CommandsHost Software Interface Service and Support GlossaryFigures ManualOrganization IntroductionMaxtorCorporation AbbreviationsConventions Diamondmax Plus 40 IntroductionDiamondMax Plus 40 Key Features Product DescriptionModel CYL SPT Product FeaturesFunctional / Interface MAX LBA CapacityCacheManagement MajorHDAComponents Jumper Configuration SubsystemConfigurationJumper Location / Configuration CylinderLimitationJumperDescriptionPerformanceSpecifications ProductSpecificationsDriveConfiguration ModelsandCapacitiesPhysicalDimensionsmaximum Product SpecificationsEPA Energy Star Compliance PowerRequirementsPowerModeDefinitions EnvironmentalLimitsShock and Vibration ReliabilitySpecificationsParameter Operating NON-OPERATING SafetyRegulatoryCompliance EMC/EMIHardDriveHandlingPrecautions HandlingandInstallationElectro-StaticDischargeESD Installation UnpackingandInspectionPhysicalInstallation RepackingBefore You Begin Hook upSet up Start upATInterfaceDescription InterfaceConnectorPIN Signal PinDescriptionSummaryPin Description Table PIN Name Signal Name Signal DescriptionAT Interface Description Timing Parameters Mode PIO TimingTiming Parameters Mode 0 Mode 1 Mode DMATimingMode MIN MAX Ultra DMA TimingSustained Ultra DMA Data In Burst Device Terminating an Ultra DMA Data In Burst Initiating an Ultra DMA Data Out Burst Device Pausing an Ultra DMA Data Out Burst Device Terminating an Ultra DMA Data Out Burst Port Read Write HostSoftwareInterfaceTask File Registers Abrt TK0 AmnfHost Software Interface Contents LBA BitsBusy Drdy DSC DRQ ERR LBA DRV HS3 HS2 HS1 HS0CommandRegister Summary Command Name Command Code Parameters UsedTimer Value TIME-OUT Period SDHIEN Control Diagnostic RegistersDS0 Reset and Interrupt Handling InterfaceCommands ReadCommands Interface Commands Read DMA WriteCommands Write Multiple SetFeatureCommands Value DescriptionPowerModeCommands Timer Value TIME-OUT Period InitializationCommands Word Content Description15-8 = PIO data transfer mode Interface Commands Word Content Description Initialize Drive Parameters Seek,FormatandDiagnosticCommands Error Code DescriptionA.R.T. CommandSet Key RegisterNoQuibble Service ServiceandSupportServicePolicy SupportService and Support From DialGlossary Directmemoryaccess CorrectableerrorDirectaccess ErrorcorrectioncodeeccExtrapulse HarderrorHeaddiskassemblyhda FeedbackLatebit PhaselockedlooppllLandingzoneorlzone LatewindowReadgatesignal PhasemarginRandomaccessmemoryram RecoverableerrorUN-CORRECTABLEERROR SofterrorStrobeoffsetsignal Unrecoverableerror