Partially hit data Lack data | Fujitsu MPA3052AT, MPA3043AT instruction

1)The disk drive sets the HAP to the address where the partially hit data is stored, and sets the DAP to the address just after the partially hit data.

HAP

Partially hit data

Lack data

DAP

2)The disk drive starts transferring partially hit data and reads lack data from the disk media at the same time. However, the disk drive does not perform the read-ahead operation newly.

Requested data to be transferred

HAP (stopped)

Partially hit data

Lack data

DAP

(stopped)

3)The cache data for next read command is as follows.

Cache data

Start LBA

Last LBA

C141-E034-02EN

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Fujitsu MPA3052AT, MPA3043AT, MPA3026AT, MPA3035AT, MPA3017AT manual Partially hit data Lack data

Contents

C141-E034-02EN Revision Record Chapter Preface Conventions for Alert Messages Liability Exception Contents Interface Theory of Device Operation Operations Page Figures Page Tables Device Overview Features Functions and performance Interface AdaptabilityPage Specifications Device Specifications Specifications summary Model names and product numbers Model and product number Current and power dissipation Current fluctuation Typ. at +5V when power is turned on Acoustic noise specification MTBF= Shock and vibration specification Error Rate Disk drive outerview Device Configuration System ConfigurationPage Configuration of disk media heads 2 1 drive connection System Configuration ATA interface 3 2 drives connection 2 drives configuration Dimensions Mounting Cable Connections Jumper Settings Installation Conditions Dimensions Orientation PCA Limitation of side-mountingPage Service area Connector locations Cable Connections Device connector Device connection Cable connector specificationsSpecters Strip AMP Power supply connector CN1 +12V Return +5V ReturnCN1 11 Factory default setting Jumper configuration Factory default setting 14 Example 1 of Cable Select 13 Jumper setting of Cable Select 092 Disk Outline Head structure Head Spindle ActuatorAir filter Circuit Configuration MPA30xxAT Block diagram Power-on Sequence Power-on operation sequence Self-calibration contents Command processing during self-calibration Self-calibration execution timechart Read/write preamplifier PreAMP Write circuitWrite precompensation algorithm Read/write circuit block diagram Read circuit Frequency characteristic of programmable filter PR4 signal transfer Time base generator circuit Write clock frequency and transfer rate of each zone Servo control circuit Physical sector servo configuration on disk surface Page Data-surface servo format Servo frame formatPAD Actuator motor control Spindle motor control Page Chapter Interface Physical Interface Interface signals Chip Select RESET- Reset Csel Cable Select GND GroundChip Select Dasp GND Signal assignment on the connectorSignal assignment on the interface connector Reset Pidag IORHdmardy Hstrobe Iordy DdmardyDstrobe 1 I/O registers DA2 DA1 DA0 Registers Icrc UNC Idnf Abrt TK0NF Amnf Command block registersPage DEV HS3 HS2 HS1 HS0 BSY Drdy DSC DRQ Corr ERR Page Srst Control block registers Command code and parameters 1 Command code and parameters Standby Immediate Sleep Check Power Mode Smart Command code and parameters 2 Command descriptions LBALBA LSB LBA Read Multiple XC4 BSY Drdy Intrq DRQ Execution example of Read Multiple command LBA LBA LBA Write Multiple XC5 LBA Write Verify X3C LBA 1F3 HSN Sector No Identify Device XEC Initialize Device ParametersPage Information to be read by Identify Device command 1 Information to be read by Identify Device command 2 Information to be read by Identify Device command 3 Identify Device DMA XEE SET Features XEF Features register values and settable modes ‘BB’‘CC’ SET Multiple Mode XC6 Page Diagnostic code Page LBA LBA Write Buffer XE8 Page Page Page Page XFF Page ’DA’ Features Register values subcommands and functionsPage 1FE 1FF Format of device attribute value data Format of insurance failure threshold value data Page Page 10 Command code and parameters Error posting Data transferring commands from device to host ∙ Execute Device Diagnostic ∙ Initialize Device Parameters DRQ Intrq BSY Drdy DRQ Intrq BSY Drdy DRQ Intrq Write Sectors command protocol BSY Drdy Intrq Commands without data transfer ∙ Read DMA ∙ Write DMA Other commandsDMA data transfer commands ∙ Read Multiple ∙ Sleep ∙ Write Multiple IOW DRQ Dmarq Dmack Ultra DMA feature set Overview Phases of operation Data in transfer Pausing an Ultra DMA data in burst Terminating an Ultra DMA data in burst Page Page Data out transfer Pausing an Ultra DMA data out burst Terminating an Ultra DMA data out burst Page Ultra DMA CRC rules DIOW-STOP Series termination required for Ultra DMA11 Recommended series termination for Ultra DMA DIOR-HDMARDY-HSTROBE Timing PIO data transfer IOCS16 Iordy DIOR-/DIOW Dmarq Dmack DIOR-/DIOW Single word DMA data transfer Multiword data transfer 11 Multiword DMA data transfer timing mode 12 Initiating an Ultra DMA data in burst Ultra DMA data transfer Dmardy Name Mode Comment MIN MAX Pull-up time before allowing Iordy to be 13 Sustained Ultra DMA data in burst Sustained Ultra DMA data in burst 14 Host pausing an Ultra DMA data in burst Host pausing an Ultra DMA data in burst 15 Device terminating an Ultra DMA data in burst Device terminating an Ultra DMA data in burst 16 Host terminating an Ultra DMA data in burst Host terminating an Ultra DMA data in burst 17 Initiating an Ultra DMA data out burst 18 Sustained Ultra DMA data out burst Sustained Ultra DMA data out burst 19 Device pausing an Ultra DMA data out burst Device pausing an Ultra DMA data out burst 20 Host terminating an Ultra DMA data out burst Host terminating an Ultra DMA data out burst 21 Device terminating an Ultra DMA data out burst Power-on and reset BSY DaspBSY Pdiag Dasp Chapter Operations Pdiag Dasp Response to power-on Response to hardware reset Response to software reset Response to diagnostic command MPA Default parameters Logical address Power save mode LBA0 LBA1 LBA2LBA LBA Page Power commands Alternating defective sectors Spare area Alternate cylinder assignment Data buffer configuration ∙ Read Sector S ∙ Read Multiple ∙ Read DMA Caching operation Usage of read segment ∙ Write Sectors ∙ Write DMA ∙ Write Multiple DAP HAP Mis-hit data Empty data Read-ahead data HAP HAP set to hit position for data transfer Partially hit data Lack data Write Cache ∙ Write Sectors ∙ Write Multiple ∙ Write DMA Fujitsu Limited FAX Fujitsu España S.A Fujitsu Limited