Execution timing of self-calibration | Fujitsu MHT2080BH, MHT2060BH

Theory of Device Operation

4.5.2 Execution timing of self-calibration

Self-calibration is performed once when power is turned on. After that, the disk drive does not perform self-calibration until it detects an error.

That is, self-calibration is performed each time one of the following events occur:

•

•

•

When it passes from the power on for about 7 or 8 seconds except that the disk drive shifts to Low Power Idle mode, Standby mode and Sleep mode by execution of any commands.

The number of retries to write or seek data reaches the specified value.

The error rate of data reading, writing, or seeking becomes lower than the specified value.

4.5.3 Command processing during self-calibration

This enables the host to execute the command without waiting for a long time, even when the disk drive is performing self-calibration. The command execution wait time is about maximum 72 ms.

When the error rate of data reading, writing, or seeking becomes lower than the specified value, self-calibration is performed to maintain disk drive stability.

If the disk drive receives a command execution request from the host while performing self-calibration, it stops the self-calibration and starts to execute the command. In other words, if a disk read or write service is necessary, the disk drive positions the head to the track requested by the host, reads or writes data, and then restarts calibration after about 3 seconds.

If the error rate recovers to a value exceeding the specified value, self-calibration is not performed.

4-8	C141-E203-01EN

Image 62

Fujitsu MHT2080BH, MHT2060BH, MHT2040BH Execution timing of self-calibration, Command processing during self-calibration

Contents

MHT2080BH, MHT2060BH, MHT2040BH Disk Drives Product Manual For Safe Operation Handling of This Manual Revision History This page is intentionally left blank Preface Overview of Manual Conventions Conventions for Alert MessagesOperating Environment Liability Exception This page is intentionally left blank Important Alert Items Important Alert Messages This page is intentionally left blank MHT2040BH Disk Drives Product Manual MHT2040BH Disk Drives Maintenance ManualManual Organization This page is intentionally left blank Contents Installation Conditions Theory of Device Operation Interface 102 Operations IN-1 GL-1Acronyms and Abbreviations AB-1 Illustrations Figures Response to power-on when the host is powered Recommended connector specifications for the host system Tables Relationship between combination of Identifier and Security Device Overview Adaptability FeaturesFunctions and performance Interface Specifications 1/2 Device SpecificationsSpecifications summary MHT2080BH MHT2060BH MHT2040BH MHT2080BH Specifications 2/2Model and product number Examples of model names and product numbers Ripple Power RequirementsInput Voltage Current Requirements and Power Dissipation Current and power dissipation Power on/off sequence Environmental SpecificationsCurrent fluctuation Typ. at +5 V when power is turned on Environmental specifications Acoustic Noise Acoustic noise specificationShock and vibration specification Shock and Vibration Reliability Service lifeData assurance in the event of power failure Mean time between failures Mtbf Positioning error Error RateUnrecoverable read error Media Defects Advanced Power Management Advanced power management Device-initiated Interface Power Management Dipm Interface Power Management IPMHost-initiated Interface Power Management Hipm Interface power management This page is intentionally left blank Device Configuration Device Configuration Drive connection System ConfigurationSata interface Read/write circuit This page is intentionally left blank Installation Conditions Dimensions Dimensions Orientation MountingIntegration Guidance C141-E144 PCA FrameLimitation of mounting Location of breather Ambient temperature Service area Handling cautions Hios ESDSumitomo 3M Device connector Connections with Host System Recommended connector specifications for the host system Connector specifications for host systemSignal segment and power supply segment Sata interface cable connection This page is intentionally left blank Theory of Device Operation Disk OutlineSubassemblies Spindle Servo circuit Circuit ConfigurationAir filter Spindle motor driver circuit Power Supply Configuration PCA Power-on Sequence Power-on operation sequence Self-calibration contents Self-calibration Command processing during self-calibration Execution timing of self-calibration Write circuit Read/write CircuitRead/write preamplifier PreAMP RLL code Meeprml Programmable filter circuit Read circuitAGC circuit D converter circuit Digital PLL circuitFIR circuit Viterbi detection circuit Microprocessor unit MPU Servo ControlServo control circuit A converter DAC Power amplifierServo burst capture circuit Spindle motor control circuit Data area Data-surface servo formatInner guard band IGB Outer guard band OGB Physical sector servo configuration on disk surface Servo frame format Seek operation Actuator motor controlOperation to move the head to the reference cylinder Track-following operation Spindle motor control Start modeAcceleration mode Stable rotation mode This page is intentionally left blank Interface Interface signals Physical Interface 5VDC/GND Comreset / CominitComwake Signal interface regulation Out of band signaling Primitives descriptions Electrical specifications Physical Layer Electrical Requirements 1/2 Ominit COMRESET/CPhysical Layer Electrical Requirements 2/2 Connector pinouts Connector pinouts Conceptual diagram of communication layers Logical Interface Link layer Communication layersPhysical layer Transport layer Outline of the Shadow Block Register Shadow Block Register Register Host to Device Outline of the frame information structure FISFIS types Register Host to Device FIS layout Register Device to Host DMA Active Device to Host DMA Setup Device to Host or Host to Device Bidirectional TAG Bist Active Bidirectional Bist combinations Data Host to Device or Device to Host Bidirectional Data FIS Bidirectional layout UNC Error FieldShadow block registers Sector Number Field exp Features Field expSector Count Field exp Cylinder Low Field exp HS3 HS2 HS1 HS0 Cylinder High Field expDevice/Head Field HS3 Status field Bit Device Write Fault DF bitBit Error ERR bit Bit 7 Busy BSY bit Device Control Field Command FieldBit 2 Software Reset Srst EStatus Field Command code and parameters 1/3 Host CommandsCommand code and parameters Command code and parameters 2/3 Command code and parameters 3/3 Command descriptions Error reporting conditions Recalibrate X’10’ to X’1F’ Read Sectors X’20’ or X’21’ LBA LSB LBA Read Long X’22’ or X’23’ Write Sectors X’30’ or X’31’ 00 *1 Error information Write Long X’32’ or X’33’ Cylinder No. LSB Write Verify X’3C’ Host Commands Read Verify Sectors X’40’ or X’41’ Host Commands Seek X’70’ to X’7F’ Execute Device Diagnostic X’90’ Diagnostic code Initialize Device Parameters X’91’ Download Microcode X’92’ Operation of Download Microcode Error reporting conditions Standby Immediate X’94’ or X’E0’ Idle Immediate X’95’ or X’E1’ Standby X’96’ or X’E2’ Idle X’97’ or X’E3’ Host Commands Check Power Mode X’98’ or X’E5’ ’FF’ Comreset Sleep X’99’ or X’E6’ Smart X’B0’ Features Field values subcommands and functions 1/3 Smart Disable Operations Features Field values subcommands and functions 2/3Smart Enable Operations Smart Read LOG Smart Return Status Features Field values subcommands and functions 3/3’DB’ Smart ENABLE/DISABLE Auto OFF-LINE Key C2h 1FF 11 Format of guarantee failure threshold value data10 Format of device attribute value data Data format version number Attribute ID Attribute value for the worst case so far Status FlagCurrent attribute value Raw attribute value 13 Self-test execution status 12 Off-line data collection statusSelf-test execution status 15 Failure prediction capability flag 16 Drive error logging capability14 Off-line data collection capability Checksum Guarantee failure thresholdSmart error logging 17 Log Directory Data Format 18 Data format of Smart Summary Error Log 1/2 Error data structure 18 Data format of Smart Summary Error Log 2/2Command data structure Total number of drive errors 19 Data format of Smart Comprehensive Error Log Smart Self-Test Self-test number 20 Smart self-test log data format1FC Self-test index Current LBA under test 21 Selective self-test log data structureTest Span Current Span under test Feature Flags22 Selective self-test feature flags Selective Self-test pending time min Device Configuration Freeze Device Configuration XB1Device Configuration Restore Device Configuration Identify Device Configuration Restore Features Field = C0h Device Configuration Freeze Lock Features Field = C1h Device Configuration Identify Features Field = C2h Device Configuration SET Features Field = C3h 23 Device Configuration Identify data structure Word Value Content Read Multiple X’C4’ Execution example of Read Multiple command LBA LSB Write Multiple X’C5’ At command issuance Shadow Block Registers setting contents SET Multiple Mode X’C6’ Host Commands Read DMA X’C8’ or X’C9’ LBA Write DMA X’CA’ or X’CB’ Host Commands Read Buffer X’E4’ Flush Cache X’E7’ Write Buffer X’E8’ Identify Device X’EC’ Identify Device DMA X’EE’ 24 Information to be read by Identify Device command 1/3 ’3FFF’ 24 Information to be read by Identify Device command 2/3 24 Information to be read by Identify Device command 3/3 Interface Bit 0 Reserved C141-E203-01EN FIS Host Commands Word Bit Bit 0 1 = Supports the Mode C141-E203-01EN Interface SET Features X’EF’ 25 Features field values and settable modes 1/2 25 Features field values and settable modes 2/2 Data Transfer Mode Advanced Power Management APM Serial ATA Functions Automatic Acoustic Management AAM 26 Contents of Security SET Password data Error reporting conditions Security UNLOCKX’F2’ When the master password is selectedWhen the user password is selected Host Commands Security Erase Prepare X’F3’ Security Erase Unit X’F4’ Security Freeze Lock X’F5’ Error reporting conditions 28 Contents of security password Error reporting conditions Read Native MAX Address X’F8’ Lbalsb SET MAX X’F9’ SET MAX Address SET MAX SET Password Features Field = 01h Password information SET MAX Lock Features Field = 02h SET MAX Unlock Features Field = 03h SET MAX Freeze Lock Features Field = 04h SN EXP Read Sector S EXT X’24’ DescriptionCL EXP Read DMA EXT X’25’ Description Read Native MAX Address EXT X’27’ Read Multiple EXT X’29’ Read LOG EXT X2F CL EXP SN EXP 29 Data format of Read Log Ext log page 10h 30 Tag field information Write Sector S EXT X’34’ Description Write DMA EXT X’35’ Description SET MAX Address EXT X’37’ SET MAX LBA Write Multiple EXT X’39’ Write LOG EXT X3F Error information 132 C141-E203-01EN Read Verify Sector S EXT X’42’ Flush Cache EXT X’EA’ Write Multiple FUA EXT XCE Write DMA FUA EXT X3D Read FP DMA Queued Write FP DMA Queued Command Name Error posting31 Command code and parameters 1/2 Sfrw Sfrr 31 Command code and parameters 2/2 Execute Device Diagnostic Initialize Device Parameters Command ProtocolNon-data command protocol Host PIO data-in command protocol PIO data-out command protocol Piosu Data 12 PIO data-out command protocol Piosu DMA data-in command protocol Read DMA EXT Identfy DMA DMA data-out command protocol Write DMA EXT FUA EXT Native Command Queuing protocol Read FP DMA Queued Write FP DMA Queued 15 Read FP DMA Queued command protocol 16 Write FP DMA Queued command protocol Power-on and Comreset 17 Power-on sequence 18 Comreset sequence Operations Reset and Diagnosis Response to power-on Reset and Diagnosis Response to Comreset Response to Comreset Response to a software reset Response to a software reset Active mode Power SavePower save mode Active idle mode Standby mode Sleep mode Power commands Partial mode Interface Power SavePower save mode of the interface Slumber mode 8MB buffer Read-ahead CacheData buffer structure Data that is a target of caching Commands that are targets of cachingCaching operation Invalidating caching-target data Using the read segment buffer Miss-hit Sequential hit Full hit HAP end location of the previous read command Partial hit Cache operation Command that are targets of cachingWrite Cache Invalidation of cached data Cashing function when power supply is turned on Status report in the event of an errorComreset and software reset response Enabling and disabling This page is intentionally left blank Glossary PIO Programmed input-output Power save modeRotational delay Positioning Acronyms and Abbreviations This page is intentionally left blank Block diagram Index Index Device-initiated interface power Frame information structure FIS Moving head to reference cylinder .4-13 Read Native MAX Address RLL algorithm run length limited Sensing and compensating for IN-8 C141-E203-01EN Japan Comment FormDisk Drives Product Manual This page is intentionally left blank C141-E203-01EN This page is intentionally left blank