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Fujitsu MPB3054AT, MPB3032AT, MPB3052AT, MPB3021AT, MPB3043AT manual Usage of read segment

Models: MPB3043AT MPB3021AT MPB3052AT MPB3032AT MPB3054AT

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(3)Invalidating caching data

Caching data in the data buffer is invalidated in the following case.

1)Following command is issued to the same data block as caching data.

∙WRITE SECTOR(S)

∙WRITE DMA

∙WRITE MULTIPLE

2)Command other than following commands is issued (all caching data are invalidated)

∙READ SECTOR (S)

∙READ DMA

∙READ MULTIPLE

∙WRITE SECTOR(S)

∙WRITE MULTIPLE

∙WRITE DMA

3)Caching operation is inhibited by the SET FEATURES command.

4)Issued command is terminated with an error.

5)Soft reset or hard reset occurs, or power is turned off.

6)The device enters the sleep mode.

7)Under the state that the write data is kept in the data buffer for write command as a caching data, new write command is issued. (write data kept until now are invalidated)

6.5.3Usage of read segment

This subsection explains the usage of the read segment buffer at following cases.

(1)Miss-hit (no hit)

A lead block of the read-requested data is not stored in the data buffer. The requested data is read from the disk media.

The read-ahead operation is performed till the buffer becomes full when the received lead sector address is sequential to the last sector address of previous read command. When it is not sequential, the drive checks that the sequential read command is executed for last received ten read commands. When no sequential read command is issued, the read-ahead operation is stopped (refer to item (2)).

C141-E045-02EN

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Fujitsu MPB3054AT, MPB3032AT, MPB3052AT, MPB3021AT, MPB3043AT manual Usage of read segment

Contents

C141-E045-02EN MPB3021AT MPB3032AT MPB3043AT MPB3052AT MPB3064AT DISK DRIVESPRODUCT MANUAL March Revised contentsREVISION RECORD EditionPage PREFACE DEVICE CONFIGURATIONINSTALLATION CONDITIONS ChapterConventions for Alert Messages LIABILITY EXCEPTION C141-E045-02ENPage CHAPTER CONTENTSCHAPTER CHAPTERJumper configuration Location of setting jumpersFactory default setting Circuit ConfigurationCommand code and parameters Command block registersHost Commands Command descriptionsDevice Response to the Reset Device pausing an Ultra DMA data out burstPower-on and reset Response to power-onFIGURES Protocol for the command execution without data transfer Protocol for command abortWRITE SECTORS command protocol Multiword DMA data transfer timing modeTABLES Page 1.6 Shock and Vibration 1.7 Reliability 1.8 Error Rate 1.1 Features 1.2 Device Specifications 1.3 Power Requirements1.4 Environmental Specifications 1.5 Acoustic Noise 1.1 Features 1.1.1 Functions and performance1.1.2 Adaptability 1.1.3 InterfaceC141-E045-02EN 5 Error correction and retry by ECC6 Write cache 1.2 Device Specifications 1.2.1 Specifications summary Table 1.1 SpecificationsTable 1.2 Model names and product numbers 1.3 Power Requirements1.2.2 Model and product number Table 1.3 Current and power dissipation Figure 1.1 Current fluctuation Typ. when power is turned on Table 1.5 Acoustic noise specification 1.4 Environmental SpecificationsEnvironmental specifications 1.5 Acoustic Noise1.7 Reliability Table 1.6 Shock and vibration specification1.6 Shock and Vibration 1.8 Error Rate 1.9 Media Defects2.1 Device Configuration CHAPTER 2 DEVICE CONFIGURATION2.1 Device Configuration 2.2 System Configuration Figure 2.1 Disk drive outerviewMPB3052AT 3 disks MPB3064AT 3 disks 2 Head 1 DiskMPB3021AT 1 disk MPB3032AT 2 disks MPB3043AT 2 disks C141-E045-02ENMPB3032ATT Model Figure 2.2 Configuration of disk media headsMPB3043AT Model 2.2.2 1 drive connection 2.2 System Configuration 2.2.1 ATA interfaceFigure 2.3 1 drive system configuration AT busHost AT bus Host interface Figure 2.4 2 drives configuration2.2.3 2 drives connection HA Host adaptorPage 3.1 Dimensions CHAPTER 3 INSTALLATION CONDITIONS3.1 Dimensions 3.2 Mounting 3.3 Cable Connections 3.4 Jumper Settings Figure 3.1 Dimensions C141-E045-02EN3.2 Mounting Figure 3.2 OrientationFigure 3.3 Limitation of side-mounting Figure 3.4 Mounting frame structureFigure 3.5 Surface temperature measurement points Table 3.1 Surface temperature measurement points and standard valuesFigure 3.6 Service area ∙ Power supply connector CN1 ∙ ATA interface connector CN1 3.3 Cable Connections 3.3.1 Device connectorFigure 3.7 Connector locations Power supply connector CN1 Mode Setting Pins3.3.3 Device connection 3.3.2 Cable connector specificationsTable 3.2 Cable connector specifications Figure 3.8 Cable connections3.4.1 Location of setting jumpers 3.3.4 Power supply connector CN1Figure 3.9 Power supply connector pins CN1 3.4 Jumper Settings Figure 3.10 Jumper locationFigure 3.12 Jumper setting of master or slave device 3.4.2 Factory default settingFigure 3.11 Factory default setting 3.4.3 Jumper configuration Figure 3.15 Example 2 of Cable Select Figure 3.13 Jumper setting of Cable SelectFigure 3.14 Example 1 of Cable Select b Special mode 3 Special setting 1 SP1a Default mode Master DeviceCHAPTER 4 THEORY OF DEVICE OPERATION 4.1 Outline 4.2 Subassemblies 4.3 Circuit Configuration4.4 Power-on sequence 4.5 Self-calibration 4.6 Read/Write Circuit 4.7 Servo ControlMPB3064AT Model 4.2.2 HeadMPB 3052AT M odel Figure 4.1 Head structure4.2.5 Air filter 4.2.3 Spindle4.2.4 Actuator 4.3 Circuit Configuration Figure 4.2 MPB30xxAT Block diagram C141-E045-02EN4.4 Power-on Sequence Figure 4.3 Power-on operation sequence 4.5.1 Self-calibration contents 4.5 Self-calibrationTable 4.1 Self-calibration execution timechart 4.5.3 Command processing during self-calibration4.6.2 Write circuit 4.6 Read/write Circuit4.6.1 Read/write preamplifier PreAMP Table 4.2 Write precompensation algorithmFigure 4.4 Read/write circuit block diagram C141-E045-02ENFigure 4.5 Frequency characteristic of programmable filter 4.6.3 Read circuitFigure 4.6 PR4 signal transfer C141-E045-02EN4.6.4 Time base generator circuit Table 4.3 Write clock frequency and transfer rate of each zone 4.7 Servo ControlFigure 4.7 Block diagram of servo control circuit 4.7.1 Servo control circuitDrives the VCM to position the head to the specified cylinder Figure 4.8 Physical sector servo configuration on disk surfacec. Seek to specified cylinder d. Calibration3 A/D converter ADC 5 Power amplifier2 Servo burst capture circuit 4 D/A converter DACFigure 4.9 Servo frame format 4.7.2 Data-surface servo format4.7.3 Servo frame format 4.7.4 Actuator motor control 4.7.5 Spindle motor control C141-E045-02EN 2 Acceleration mode3 Stable rotation mode CHAPTER 5 INTERFACE 5.1 Physical Interface 5.2 Logical Interface 5.3 Host Commands5.4 Command Protocol 5.5 Ultra DMA feature Set 5.6 Timing 5.1 Physical Interface 5.1.1 Interface signals Figure 5.1 Interface signals5.1.2 Signal assignment on the connector Table 5.1 Signal assignment on the interface connectorsignal register access Read or Write when the device is not ready to signalThis signal is negated to extend the host transfer cycle of any host DDMARDY- is a flow control signal for Ultra DMA data out5.2 Logical Interface 5.2.1 I/O registersTable 5.2 I/O registers 5.2.2 Command block registers 3 Features register X1F1 Diagnostic code X01 No Error Detected X03 Data Buffer Compare ErrorX05 ROM Sum Check Error X80 Device 1 slave device Failed 4 Sector Count register X1F2Bit 3 HS3 CHS mode head address 3 23. LBA bit The contents of this register indicate the device and the head numberBit 7 Unused Bit 6 L. 0 for CHS mode and 1 for LBA mode Bit 5 Unused Bit 2 HS2 CHS mode head address 3 22. LBA bitC141-E045-02EN 9 Status register X1F7DRDY Always 10 Command register X1F7Always C141-E045-02EN5.3 Host Commands 5.2.3 Control block registers5.3.1 Command code and parameters Table 5.3 Command code and parameters 1 ofTable 5.3 Command code and parameters 2 of 5.3.2 Command descriptions 1F7 HCM At command issuance I/O registers setting contents1 READ SECTORS X20 or 1F6 HDH1F7 HST At command completion I/O registers contents to be readError information Status informationFigure 5.2 Execution example of READ MULTIPLE command 1 Single word DMA transfer mode ∙ The data transfer starts at the timing of DMARQ signal assertionIn LBA mode 2 Multiword DMA transfer modeAt command issuance I/O registers setting contents At command completion I/O registers contents to be readError information 1F7 HSTAt command issuance I/O registers setting contents At command completion I/O registers contents to be readError information 1F7 HST1F7 HST At command completion I/O registers contents to be readError information Status informationError information At command issuance I/O registers setting contentsAt command completion I/O registers contents to be read ∙ The data transfer starts at the timing of DMARQ signal assertion3 Ultra DMA transfer mode 1 Single word DMA transfer mode2 Multiword DMA transfer mode At command issuance I/O registers setting contentsError information At command issuance I/O registers setting contentsAt command completion I/O registers contents to be read This command can be issued in the LBA modeAt command issuance I/O registers setting contents At command completion I/O registers contents to be readError information At command completion I/O registers contents to be readAt command completion I/O registers contents to be read In LBA modeAt command issuance I/O registers setting contents Error InformationError information At command issuance I/O registers setting contentsAt command completion I/O registers contents to be read 1F7HCMTable 5.4 Information to be read by IDENTIFY DEVICE command 1 of C141-E045-02ENTable 5.4 Information to be read by IDENTIFY DEVICE command 2 of Table 5.4 Information to be read by IDENTIFY DEVICE command 3 of Error information At command issuance I/O registers setting contentsAt command completion I/O registers contents to be read 14 SET FEATURES XEFTable 5.5 Features register values and settable modes X‘08’ Mode PIO default transfer modePIO flow control transfer mode X‘09’ ModeError information At command issuance I/O registers setting contentsAt command completion I/O registers contents to be read Word 59 = 0000 The READ MULTIPLE and WRITE MULTIPLE commands areTable 5.6 Diagnostic code Diagnostic code At command issuance I/O registers setting contentsAt command completion I/O registers contents to be read 1 This register indicates X‘00’ in the LBA mode 17 FORMAT TRACKError information At command issuance I/O registers setting contentsAt command completion I/O registers contents to be read This command is operated under the following conditionsError information At command issuance I/O registers setting contentsAt command completion I/O registers contents to be read At command issuance I/O registers setting contentsAt command issuance I/O registers setting contents At command completion I/O registers contents to be readError information At command completion I/O registers contents to be readAt command issuance I/O registers setting contents Point of timerDisable of timer Period of timerAt command issuance I/O registers setting contents At command completion I/O registers contents to be readError information At command completion I/O registers contents to be readAt command completion I/O registers contents to be read At command issuance I/O registers setting contentsPeriod of timer Error informationError information At command issuance I/O registers setting contentsAt command completion I/O registers contents to be read This command is the only way to make the device enter the sleep mode27 CHECK POWER MODE X98 or XE5 At command completion I/O registers contents to be readError information The host checks the power mode of the device with this commandError information At command issuance I/O registers setting contentsAt command completion I/O registers contents to be read 1F7 HCMTable 5.7 Features Register values subcommands and functions At command completion I-O registers setting contents At command issuance I-O registers setting contentsSubcommand Error informationTable 5.8 Format of device attribute value data Table 5.9 Format of insurance failure threshold value data Power-on time Read error rateSeek error rate Number of power-on-power-off timesBits 2 to 15 Reserved bits ∙ Check sum ∙ Raw attribute value Raw attributes data is retained∙ Failure prediction capability flag ∙ Insurance failure thresholdAt command completion I/O registers contents to be read NOTE - This command may take longer than 30 s to completeAt command issuance I/O registers setting contents Error informationICRC 5.3.3 Error postingTable 5.10 Command code and parameters ABRT5.4 Command Protocol 5.4.1 Data transferring commands from device to hostFigure 5.3 Read Sectors command protocol Figure 5.4 Protocol for command abort 5.4.2 Data transferring commands from host to deviceFigure 5.5 WRITE SECTORS command protocol 5.4.3 Commands without data transfer Figure 5.6 Protocol for the command execution without data transfer5.4.4 Other commands 5.4.5 DMA data transfer commandsFigure 5.7 Normal DMA data transfer 5.5 Ultra DMA feature set 5.5.1 Overview 5.5.3.1 Initiating an Ultra DMA data in burst 5.5.2 Phases of operation5.5.3 Ultra DMA data in commands 5.5.3.3 Pausing an Ultra DMA data in burst 5.5.3.2 The data in transfer5.5.3.4 Terminating an Ultra DMA data in burst b Host terminating an Ultra DMA data in burst C141-E045-02EN5.5.4 Ultra DMA data out commands 5.5.4.1 Initiating an Ultra DMA data out burst5.5.4.3 Pausing an Ultra DMA data out burst 5.5.4.2 The data out transfer5.5.4.4 Terminating an Ultra DMA data out burst b Device terminating an Ultra DMA data out burst C141-E045-02EN5.5.5 Ultra DMA CRC rules Figure 5.8 Ultra DMA termination with pull-up or pull-down 5.5.6 Series termination required for Ultra DMATable 5.11 Recommended series termination for Ultra DMA 5.6 Timing 5.6.1 PIO data transfer C141-E045-02ENFigure 5.9 PIO data transfer timing 5.6.2 Single word DMA data transfer Figure 5.10 Single word DMA data transfer timingFigure 5.11 Multiword DMA data transfer timing mode 5.6.3 Multiword data transferFigure 5.12 Initiating an Ultra DMA data in burst 5.6.4 Ultra DMA data transfer5.6.4.1 Initiating an Ultra DMA data in burst negatedMinimum delay time required for output 5.6.4.2 Ultra DMA data burst timing requirementsTable 5.12 Ultra DMA data burst timing requirements 1 of tZIORDY Table 5.12 Ultra DMA data burst timing requirements 2 oftIORDYZ tACK5.6.4.3 Sustained Ultra DMA data in burst Figure 5.13 Sustained Ultra DMA data in burst5.6.4.4 Host pausing an Ultra DMA data in burst Figure 5.14 Host pausing an Ultra DMA data in burst5.6.4.5 Device terminating an Ultra DMA data in burst Figure 5.15 Device terminating an Ultra DMA data in burst5.6.4.6 Host terminating an Ultra DMA data in burst Figure 5.16 Host terminating an Ultra DMA data in burst5.6.4.7 Initiating an Ultra DMA data out burst Figure 5.17 Initiating an Ultra DMA data out burst5.6.4.8 Sustained Ultra DMA data out burst Figure 5.18 Sustained Ultra DMA data out burst5.6.4.9 Device pausing an Ultra DMA data out burst Figure 5.19 Device pausing an Ultra DMA data out burst5.6.4.10 Host terminating an Ultra DMA data out burst Figure 5.20 Host terminating an Ultra DMA data out burst5.6.4.11 Device terminating an Ultra DMA data in burst Figure 5.21 Device terminating an Ultra DMA data out burst5.6.5 Power-on and reset Figure 5.22 Power-on Reset Timing6.6 Write Cache 6.1 Device Response to the Reset 6.1 Device Response to the Reset 6.2 Address Translation6.3 Power Save 6.4 Defect Management 6.5 Read-Ahead Cache CHAPTER 6 OPERATIONS6.1.1 Response to power-on Figure 6.1 Response to power-on6.1.2 Response to hardware reset Figure 6.2 Response to hardware reset6.1.3 Response to software reset Figure 6.3 Response to software reset6.1.4 Response to diagnostic command Figure 6.4 Response to diagnostic command6.2 Address Translation 6.2.1 Default parametersDefault parameters Figure 6.5 Address translation example in CHS mode 6.2.2 Logical addressFigure 6.6 Address translation example in LBA mode 6.3 Power Save 6.3.1 Power save mode∙ Power-on sequence is completed 1 Active modeA device enters the active mode under the following conditions ∙ A command other than power commands is issued6.3.2 Power commands 6.4 Defect ManagementFigure 6.7 Sector slip processing 6.4.1 Spare area6.4.2 Alternating defective sectors Defectiveunused Figure 6.8 Alternate cylinder assignmentSector physical 6.5 Read-Ahead Cache 6.5.1 Data buffer configurationFigure 6.9 Data buffer configuration 6.5.2 Caching operation 6.5.3 Usage of read segment HAP Segment only for read DAP 4 Following shows the cache enabled data for next read commandCache enabled data Stores the read-requested data upto this pointMis-hit data a. Sequential command just after non-sequential command3 Sequential read Empty dataRead-ahead data HAP Read-ahead data DAP Last LBA Start LBA b. Sequential hitHAP Completion of transferring requested data Hit data4 Finally, the cache data in the buffer is as follows Read-ahead data c. Non-sequential read command just after sequential read commandHAP Read-ahead data DAP Start LBA3 The cache data for next read command is as follows Cache data Last position at previous read commandDAP Last position at previous read command HAP set to hit position for data transferstopped 6.6 Write Cache When the write cache function is enabled, the transferred data from the host by the WRITE SECTORS is not completely written on the disk medium at the time that the interrupt of command complete is generated. When the unrecoverable error occurs during the write operation, the command execution is stopped. Then, when the drive receives the next command, it generates an interrupt of abnormal end. However an interrupt of abnormal end is not generated when a write automatic assignment succeeds. However, since the host may issue several write commands before the drive generates an interrupt of abnormal end, the host cannot recognize that the occurred error is for which command generally. Therefore, it is very hard to retry the unrecoverable write error for the host in the write cache operation generally. So, take care to use the write cache function I, Place des Etas-Unis, SILIC 310, 94588 Rungis Cedex, FRANCE FUJITSU LIMITED Reader Comment Form