Samsung 3.5" hard disk drives, spinpoint v40 manual Set Features EFh, Mode

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DISK DRIVE OPERATION

6.4.19 Set Features (EFh)

This command is used by the host to establish the following parameters, which affect the execution of certain drive features as shown in Table 6-8.

 

Table 6-8Set Feature Register Definitions

 

 

Code

Description

 

 

02h

Enable Write Cache

03h

Set transfer mode based on value in Sector Count register

 

 

33h

Disable Retry

42h

Enable Automatic Acoustic management feature set.

44h

Entire bytes of ECC apply on Read Long/Write Long commands

 

 

55h

Disable read look-ahead feature

66h

Disable reverting to power on defaults

77h

Disable ECC

 

 

82h

Disable Write Cache

88h

Enable ECC

 

 

99h

Enable Retries

AAh

Enable read look-ahead feature

BBh

4 bytes of ECC apply on Read Long/Write Long commands

C2h

Disable Automatic Acoustic management feature set.

 

 

CCh

Enable reverting to power on defaults

When the drive receives this command, it sets BSY, checks the contents of the Feature register, clears BSY, and generates an interrupt. If the value in the Feature register is not supported or is invalid, the drive posts an Aborted Command error. Refer to section 6.6.3 for the protocol.

A host can choose the transfer mechanism by Set Transfer Mode and specifying a value in the Sector Count register. The upper 5 bits define the type of transfer, and the low order 3 bits encode the mode value. Refer to Table 6-9.

Table 6-9Transfer mode values

MODE

Bits(7:3)

Bits(2:0)

PIO default mode

00000

000

PIO default mode, disable IORDY

00000

001

PIO flow control transfer mode

00001

mode

Multiword DMA mode

00100

mode

Ultra DMA mode

01000

mode

mode = transfer mode number

SpinPoint V40 Product Manual

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Contents Spinpoint SpinPoint V40 Product Manual Table of Contents Ervo S Ystem EAD and W Rite O Perations Irmware F EaturesSmart Programming Requirements Protocol OverviewTiming General Information Maintenance PrecautionsService and Repair 107Table of Figures Page User Definition Manual OrganizationScope Format C/S Commands and MessagesTerminology and Conventions Computer MessageReference Key Features IntroductionDescription Hardware Requirements Standards and RegulationsSpecifications Specification SummaryLogical Configurations Physical SpecificationsPerformance Specifications 28.71 Power RequirementsSV6003H SV6014H SV8004H Environmental SpecificationsMtbf POH Reliability SpecificationsSpace Requirements InstallationUnpacking Instructions MountingOrientation 2Mounting Dimensions in Millimeters 3Mounting-Screw Clearance ClearanceVentilation Cable ConnectorsDC Power Connector AT-Bus Interface ConnectorSpinPoint V40 Product Manual Jumper Block Configurations Options for Jumper Block Configuration 7DC Power Connector and AT-Bus Interface Cable Connections Drive InstallationParameter System Startup ProcedureSystem Setup Disk Drive Operation Head / Disk Assembly HDABase Casting Assembly DC Spindle Motor AssemblyExploded Mechanical View Air Filtration System Disk Stack AssemblyHead Stack Assembly Voice Coil Motor and Actuator Latch AssembliesDigital Signal Process and Interface Controller Drive ElectronicsAT Disk Controller 2SID2001 AT Controller Block Diagram Host Interface Control Block Disk Control Block Buffer Control BlockSpinPoint V40 Product Manual Frequency Synthesizer Power ManagementRead/Write IC Disk ECC Control BlockAnalog Anti-Aliasing Low Pass Filter Time Base GeneratorAutomatic Gain Control Asymmetry Correction Circuitry ASC3Read/Write 88C5200 Servo System Read and Write OperationsRead Channel Firmware Features Write ChannelRead Caching Write Caching Smart Defect ManagementAutomatic Defect Allocation Multi-burst ECC CorrectionBlank Signal Conventions Signal SummaryPhysical Interface Signal Descriptions IOCS16- Drive 16-bit I/O DMACK- DMA AcknowledgeDmarq DMA Request Intrq Drive InterruptPDIAG- Passed Diagnostics RESET- Drive ResetIordy I/O Channel Ready SD2 SD8 SD6 SD9 SD5SD4 SD3Drive Host DriveDIR Environment Logical InterfaceGeneral Bit ConventionsSpinPoint V40 Product Manual N N N A a a Command Block Registers2 I/O Register Address Control Block RegistersDevice Control Register 3F6h Control Block Register DescriptionsAlternate Status Register 3F6h Drive Address Register 3F7hData Register 1F0h Command Block Register DescriptionsFeatures Register 1F1h Error Register 1F1hCylinder Low Register 1F4h Command Register 1F7hSector Count Register 1F2h Cylinder High Register 1F5hBSY Drdy DWF DSC DRQ Corr IDX ERR Status Register 1F7hAt Command Register Descriptions Command Parameter Used SpinPoint V40 Product Manual Check Power Mode 98h, E5h Execute Device Diagnostics 90hDownload Micro Code 92h Flush Cache E7h Format Track 50hIdentify Device ECh Xxxx Word Content DescriptionCapabilities Command set supported 95-128 0000h Reserved 129-159 Vendor specific 160-255 Idle 97h,E3h Idle Immediate 95h,E1hInitialize Device Parameters 91h Read Long 22hwith retry, 23h without retry Read Buffer E4hRead Multiple Command C4h Read Sectors 20hwith retry, 21hwithout retry Read Native Max Address F8hRead Verify Sectors 40hwith retry, 41hwithout retry Recalibrate 1xhSeek 7xh Mode Set Features EFhBSY Drdy DRQ ERR InputsLBA Normal outputsDescription Sleep 99h, E6h Set Multiple Mode C6hSmart disable operation D9h Standby 96h,E2hSmart B0h Smart enable/disable attribute autosave D2h Smart enable operations D8hSmart execute off-line immediate D4h Byte Descriptions Smart read data D0hOff-line data collection capability Value DefinitionSmart save attribution value D3h Smart capabilitySmart read log sector D5h Smart return status DAhWrite DMA CAh Standby 96h, E2hStandby Immediate 94h, E0h Write Buffer E8hWrite Sectors 30hwith retry, 31hwithout retry Write Multiple Command C5hSpinPoint V40 Product Manual Reset Response Error PostingProgramming Requirements BBK Command Error Register Status RegisterIdle mode Power ConditionsSleep mode Standby modeNormal mode Protocol Overview PIO Data in CommandsPIO Data Out Commands PIO Read CommandPIO Read Aborted Command BSY=0 DRQ=1 BSY=1 DRQ=0 PIO Write CommandPIO Write Aborted Command BSY=0 DRDY=1 BSY=1Non-Data Commands DMA Data Transfer Commands Aborted DMA Command Initialize DMA Reset DMA Status BSY=0 BSY=1BSY=1 BSY=0 Register transfers TimingDIOR-/DIOW Write PIO data transfers PIO timing parameters ModeAddr valid See note T1 t2 DIOR-/DIOW DIOR-/DIOW Multiword DMA data transferMultiword DMA timing parameters Mode Initiating an Ultra DMA data in burst Ultra DMA data transfer19Ultra DMA data burst timing requirements Ultra DMA data burst timing requirements5Sustained Ultra DMA data in burst Sustained Ultra DMA data in burst6Host pausing an Ultra DMA data in burst Host pausing an Ultra DMA data in burst7Device terminating an Ultra DMA data in burst 100 Device terminating an Ultra DMA data in burst8Host terminating an Ultra DMA data in burst Host terminating an Ultra DMA data in burst9Initiating an Ultra DMA data out burst 102 Initiating an Ultra DMA data out burst10Sustained Ultra DMA data out burst Sustained Ultra DMA data out burst11Device pausing an Ultra DMA data out burst 104 Device pausing an Ultra DMA data out burst12Host terminating an Ultra DMA data out burst Host terminating an Ultra DMA data out burst13Device terminating an Ultra DMA data out burst 106 Device terminating an Ultra DMA data out burstMaintenance Precautions Service And RepairGeneral Information
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