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Fujitsu MHV2040AS manual Data-surface servo format, Inner guard band, Data area, Outer guard band

Models: MHV2060AS MHV2080AS MHV2040AS

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4.7 Servo Control

4.7.2 Data-surface servo format

Figure 4.7 describes the physical layout of the servo frame. The three areas indicated by (1) to (3) in Figure 4.7 are described below.

(1) Inner guard band

This area is located inside the user area, and the rotational speed of the VCM can be controlled on this cylinder area for head moving.

(2) Data area

This area is used as the user data area SA area.

(3) Outer guard band

This area is located at outer position of the user data area, and the rotational speed of the spindle can be controlled on this cylinder area for head moving.

C141-E221

4-15

Image 71

Fujitsu MHV2040AS, MHV2080AS, MHV2060AS manual Data-surface servo format, Inner guard band, Data area, Outer guard band

Contents

Disk Drive Product Manual MHV2080AS, MHV2060AS, MHV2040ASHandling of This Manual For Safe OperationRevision History This page is intentionally left blank Overview of Manual PrefaceConventions Conventions for Alert MessagesOperating Environment Liability Exception This page is intentionally left blank Damage Interface cable connection Important Alert ItemsImportant Alert Messages This page is intentionally left blank Disk Drive Product Manual Disk Drive Maintenance ManualManual Organization MHV2080ASThis page is intentionally left blank Contents Theory of Device Operation Installation ConditionsInterface Contents101 Write Multiple EXT X’39’ Option customizing Operations Glossary GL-1 Acronyms and Abbreviations AB-1 Index IN-1 Figures IllustrationsExecution example of Read Multiple command Examples of model names and product numbers Tables127 This page is intentionally left blank Device Overview Adaptability FeaturesFunctions and performance Data buffer Error correction and retry by ECCHigh resistance against shock Connection to ATA interfaceMHV2080AS MHV2060AS MHV2040AS Device SpecificationsSpecifications summary Specifications 1Examples of model names and product numbers Model and product numberRipple Power RequirementsInput Voltage Current and power dissipation Current Requirements and Power DissipationEnvironmental specifications Environmental SpecificationsCurrent fluctuation Typ. at +5 V when power is turned on Power on/off sequenceShock and Vibration Acoustic noise specificationShock and vibration specification Acoustic NoiseMean time between failures Mtbf Service lifeData assurance in the event of power failure ReliabilityMedia Defects Error RateUnrecoverable read error Positioning errorAdvanced Power Management Advanced Power Management This page is intentionally left blank Device Configuration Device Configuration Read/write circuit System ConfigurationATA interface 2 1 drive connection3 2 drives connection 2 drives configurationInstallation Conditions Dimensions DimensionsOrientation MountingIntegration Guidance C141-E144 PCA FrameLimitation of mounting Location of breather Ambient temperature Handling cautions Service areaHandling cautions Cable Connections Device connectorFCI Cable connector specificationsCable connector specifications Device connectionLocation of setting jumpers Jumper SettingsPower supply connector CN1 Master drive-slave drive setting Factory default setting14 Csel setting Csel setting16 Example 2 of cable select Power up in standby settingTheory of Device Operation Spindle OutlineSubassemblies DiskSpindle motor driver circuit Circuit ConfigurationAir filter Servo circuitPower supply configuration PCA Power-on operation sequence Power-on SequenceSelf-calibration Self-calibration contentsExecution timing of self-calibration Command processing during self-calibrationWrite precompensation Read/write CircuitRead/write preamplifier PreAMP Write circuitProgrammable filter circuit Read circuitAGC circuit Viterbi detection circuit Digital PLL circuitFIR circuit D converter circuitServo control circuit Servo ControlA converter DAC Power amplifierMicroprocessor unit MPU Servo burst capture circuitVCM current sense resistor CSR Driver circuitOuter guard band Data-surface servo formatInner guard band Data areaPhysical sector servo configuration on disk surface Servo frame format Track following operation Actuator motor controlOperation to move the head to the reference cylinder Seek operationSpindle motor control Start modeAcceleration mode Stable rotation modeThis page is intentionally left blank Interface Physical Interface Interface signalsDasp GND Signal assignment on the connectorSignal assignment on the interface connector DA1 PDIAG-, Cblid DA0 DA2Dior MstrDiow StopIordy PdiagCblid DaspDmarq Logical InterfaceDA2 DA1 DA0 1 I/O registersI/O registers UNC Idnf Command block registersError register X’1F1’ Data register X’1F0’Sector Count register X’1F2’ Features register X’1F1’Cylinder High register X’1F5’ Sector Number register X’1F3’Cylinder Low register X’1F4’ BSY Device/Head register X’1F6’DEV HS3 HS2 HS1 HS0 Status register X’1F7’Interface Alternate Status register X’3F6’ Command register X’1F7’Control block registers HOB Srst Host CommandsCommand code and parameters Device Control register X’3F6’Parameter Used Command code and parameters 1Command Name EXT Write Multiple FUA EXT Flush Cache EXT Command code and parameters 2Host Commands Command descriptions Host Commands Recalibrate X’10’ to X’1F’ MSB Read Sectors X’20’ or X’21’End head No. / LBA MSB Write Sectors X’30’ or X’31’ 1F7HST Status information 1F6HDH MSB Write Verify X’3C’Read Verify Sectors X’40’ or X’41’ Seek X’70’ to X’7F’ Diagnostic code Execute Device Diagnostic X’90’Device responds to this command with the result of power-on Initialize Device Parameters X’91’ Download Microcode X’92’ Operation of Download Microcode Standby Immediate X’94’ or X’E0’ Unload Feature Unload Immediate Command Host Commands Standby X’96’ or X’E2’ Idle X’97’ or X’E3’ Interface ’FF’ Check Power Mode X’98’ or X’E5’Sleep X’99’ or X’E6’ Smart X’B0 Features register values subcommands and functions 1 Smart Read LOG Features register values subcommands and functions 2Smart Enable Operations Smart Disable OperationsSmart Return Status Features register values subcommands and functions 3’DB’ Smart ENABLE/DISABLE Auto OFF-LINE Host Commands Format of insurance failure threshold value data Format of device attribute value data1FF Attribute ID Data format version numberRaw attribute value Status FlagCurrent attribute value Attribute value for the worst case so far11 Self-test execution status 10 Off-line data collection statusSelf-test execution status 13 Failure prediction capability flag Off-line data collection capability12 Off-line data collection capability Failure prediction capability flagInsurance failure threshold Error logging capability14 Error logging capability Check sumSmart error logging 16 Data format of Smart Summary Error Log 17 Data format of Smart Comprehensive Error Log Command data structureError data structure Total number of drive errorsSelf-test number Smart self-test18 Smart self-test log data format 1FCCurrent span under test 19 Selective self-test log data structureTest span Current LBA under testSelective Self-test pending time min Feature Flags20 Selective self-test feature flags Device Configuration Identify Device Configuration XB1Device Configuration Restore Device Configuration FreezeDevice Configuration SET FR = C3h Device Configuration Restore FR = C0hDevice Configuration Freeze Lock FR = C1h Device Configuration Identify FR = C2hInterface 21 Device Configuration Identify data structure 1/2 21 Device Configuration Identify data structure 2/2 Read Multiple X’C4’ Execution example of Read Multiple commandMSB Write Multiple X’C5’ Interface SET Multiple Mode X’C6’ Interface MSB Read DMA X’C8’ or X’C9’End head No. / LBA MSB Write DMA X’CA’ or X’CB’ Interface Read Buffer X’E4’ Flush Cache X’E7’ Write Buffer X’E8’ Identify Device X’EC’ Identify Device DMA X’EE’ ’3FFF’ 22 Information to be read by Identify Device command 122 Information to be read by Identify Device command 2 3FFF Command without interrupt supports 2, 4, 8 and 16 sectors = Supports the Host Protected Area feature set = Supports the CFA Compact Flash Association feature set Interface Write Stream EXT Interface Host Commands Word Bit Reserved Security level High, 1 Maximum ’CC’ SET Features X’EF’23 Features register values and settable modes ’BB’Data Transfer Mode Advanced Power Management APM Automatic Acoustic Management AAM 24 Contents of Security SET Password data Interface Security UNLOCKX’F2’ When the master password is selectedWhen the user password is selected Interface Security Erase Prepare X’F3’ Security Erase Unit X’F4’ Security Freeze Lock X’F5’ Interface 26 Contents of security password Interface Read Native MAX Address X’F8’ SET MAX Address SET MAX X’F9’SET MAX SET Password FR = 01h SET MAX Lock FR = 02h SET MAX Unlock FR = 03h SET MAX Freeze Lock FR = 04h Host Commands Read Sectors EXT X’24’ Option customizing Description Read DMA EXT X’25’ Option customizing Description Error reporting conditions Read Multiple EXT X’29’ Option customizing Description Read LOG EXT X2F Optional command Customize Description Host Commands Write Sectors EXT X’34’ Option customizing Description Write DMA EXT X’35’ Option customizing Description SET MAX Address EXT X’37’ Option customizing Description Error reporting conditionsSET MAX LBA Write Multiple EXT X’39’ Option customizing Description Write DMA FUA EXT X’3D’ Option customizing Description Write LOG EXT X’3F’ Optional command Customize Description Host Commands Read Verify Sectors EXT X’42 Option customizing Description Write Multiple FUA EXT X’CE’ Option customizing Description Flush Cache EXT X’EA’ Option customizing Description Error reporting conditions27 Command code and parameters 1 Error posting27 Command code and parameters 2 Execute Device Diagnostic Initialize Device Parameters Command ProtocolPIO Data transferring commands from device to host Read Sectors Command protocol Protocol for command abort PIO Data transferring commands from host to device Write Sectors command protocol Commands without data transfer Read DMA EXT Write DMA EXT/FUA EXT Indentify Device DMA Other commandsDMA data transfer commands Read Multiple EXT Write Multiple EXT/FUA EXT SleepNormal DMA data transfer Overview Ultra DMA Feature SetInitiating an Ultra DMA data in burst Phases of operationUltra DMA data in commands Data in transfer Pausing an Ultra DMA data in burstDmarq Terminating an Ultra DMA data in burstUltra DMA Feature Set Interface Initiating an Ultra DMA data out burst Ultra DMA data out commandsData out transfer Pausing an Ultra DMA data out burstTerminating an Ultra DMA data out burst Interface Ultra DMA CRC rules DIOW-STOP Series termination required for Ultra DMA28 Recommended series termination for Ultra DMA DIOR-HDMARDY-HSTROBEPIO data transfer timing TimingPIO data transfer Multiword data transfer 10 Multiword DMA data transfer timing mode11 Initiating an Ultra DMA data in burst Ultra DMA data transferStrobe Name Mode CommentMIN MAX 29 Ultra DMA data burst timing requirements 230 Ultra DMA sender and recipient timing requirements Mode Name CommentDD150 at host Sustained Ultra DMA data in burstDstrobe at device DD150 at device Dstrobe at hostHdmardy Host pausing an Ultra DMA data in burstDmarq DmackStop Device terminating an Ultra DMA data in burstDA0, DA1, DA2 CS0, CS1 Host terminating an Ultra DMA data in burstHost 16 Initiating an Ultra DMA data out burst Hstrobe at device DD150 at device Sustained Ultra DMA data out burstHstrobe at host DD150 at host Hstrobe host DD150 Host Device pausing an Ultra DMA data out burstDevice DMACK- host Stop host DDMARDY- device 19 Host terminating an Ultra DMA data out burst Host terminating an Ultra DMA data out burstDD150 Host Device terminating an Ultra DMA data out burstDmarq device DMACK- host Only master device is present Power-on and resetMaster and slave devices are present 2-drives configuration Operations Response to power-on Device Response to the ResetResponse to power-on Response to hardware resetResponse to hardware reset Response to software reset Response to software resetResponse to diagnostic command Response to diagnostic commandActive idle mode Power SavePower save mode Active modeSleep mode Standby modeSpare area Power commandsDefect Processing Track slip processing Alternating processing for defective sectorsSector slip processing Automatic alternating processing Automatic alternating processing8MB buffer 8,388,608 bytes Read-ahead CacheData buffer structure Invalidating caching-target data Commands that are targets of cachingCaching operation Data that is a target of cachingSmart Miss-hit Using the read segment bufferSequential hit Full hit Partial hit Invalidation of cached data Command that are targets of cachingWrite Cache Cache operationEnabling and disabling Status report in the event of an errorReset response Caching function when power supply is turned onWrite Cache This page is intentionally left blank Glossary Positioning Power save modeRotational delay PIO Programmed input-outputVCM StatusThis page is intentionally left blank Acronyms and Abbreviations This page is intentionally left blank AAM IndexIndex Host pausing ultra DMA data Read Native MAX Address Read Sectors CommandSurface temperature measurement This page is intentionally left blank Japan Comment FormThis page is intentionally left blank C141-E221-02EN This page is intentionally left blank