Fujitsu MBB2147RC, MBB2073RC manual Write Write Extended Format Unit

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Data Format

Type 2 (Reassignment of write fail sector)

1)Commands to be applied

-WRITE

-WRITE EXTENDED

-FORMAT UNIT

-WRITE at executing WRITE AND VERIFY

2)Application requirements / processing

When WRITE/WRITE EXTENDED command detects any Servo error (e.g. Write offtrack error) and cannot be recovered within pre-determined retry number (specified in Mode Parameter). For the sectors around defective Servo, alternate blocks are allocated and the data of this WRITE commands are re-written.

Sectors to be made AWRE shall be following:

-the sector where the error occurs and the latter sectors and,

-the sectors whose data are logically continual and stored in Cache,

-the sectors which will be processed in this Write command and,

-the sectors which locate between erroneous Servo -1 and +1 (including Split sector)

This function is also applied for the sector that has already been re-assigned. Remark:

When a write protection is prohibited through the setting terminal, the auto alternate block allocation processing specification is disabled.

Automatic alternate block allocation is made up to the following quantities during the execution of one command:

ARRE = Twice

AWRE (Type 1) = Eight times

AWRE (Type 2) = Maximum number which can be processed within the recovery time limit

If more than the above mentioned defective block is detected, the alternate block assignment processing for the first defective block is executed but the alternate block assignment processing for the second one is not executed and the command being executed terminates. However, the initiator can recover the twice error by issuing the same command again.

When an error is detected in a data block in the data area, recovery data is rewritten and verified in automatic alternate block allocation during the execution of the READ or READ EXTENDED command. Alternate block allocation will not be made for the data block if recovery is successful.

Example: Even if the data error which is recoverable by the WRITE LONG command is simulated, automatic alternate block allocation will not be made for the data block.

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Contents MBB2147RC MBB2073RC Hard Disk Drives Product Manual For Safe Operation Revision Record Related Standards Preface Overview of ManualPreface Conventions for Alert MessagesImportant Alert Items Important Alert MessagesImportant Alert Items Data lossManual Organization Product Manual SAS Interface ManualThis page is intentionally left blank Contents Installation ContentsError Analysis Figures Tables This page is intentionally left blank Standard Features Hardware Structure System Configuration Standard FeaturesGeneral Description Standard Features General Description Hardware Structure Sata style cable SAS Plug Connector Receptacle connector System Configuration This page is intentionally left blank Model names and order numbers Hardware SpecificationsHardware Specifications Model name and order number Specifications Function specificationsMBB2147RC MBB2073RC 60/62 MeeprmlHardware Specifications Seek time ms Seek difference 4096 Cly/divEnvironmental specifications Environmental/Power requirementsMtbf = Error rateReliability Specifications Data Space Cylinder configurationData Space Logical Data Block Addressing Defect Management Data Format Data Space Alternate spare area Spare area in cellTrack format Track skew/head skew Sector formatData Space Format capacity Logical Data Block Addressing Defect Management Defect list Alternate block allocationAlternate block allocation by Format Unit command Defect ManagementAlternate block allocation by Reassign Blocks command Write Write Extend Write Write Extended Format Unit Installation Requirements Mounting Requirements DimensionsInstallation Requirements Mounting orientationsMounting Requirements Mounting frame structure exampleVent hole location MPU Surface temperature check point and maximum temperatureHDC +5VDC MBB2147RC MBB2073RC Power Supply Requirements Current waveform Max seekInterface connector CN1 power lines included Interface connector Connection RequirementsInterface connector SAS plug signal allocationCN1 Recommended connectors Ready LED output signalConnector requirements This page is intentionally left blank Installation Installation Mounting HDDs Mounting procedures SettingSetting Port Address Installation Formatting Installation Setting parameters Awre ArreRetry Count AT Verification Arre Awre PERDisable PRE-FETCH Transfer Length Xffff Minimum PRE-FETCH DiscMaximum PRE-FETCH Maximum PRE-FETCH Ceiling Xffff Number of Cache SegmentsReady LED Meaning Diagnostics Self-diagnostics Self-diagnostic functionsDiagnostics and Maintenance Diagnostics Test programs Maintenance PrecautionsMaintenance requirements Maintenance levels Tools and test equipmentTest flowchart TestsDiagnostic test Operation CheckOperation Check Initial seek operation check Operation testTroubleshooting Outline of troubleshooting procedures Troubleshooting with HDD replacement in the fieldTroubleshooting System-level field troubleshootingTroubleshooting at the repair site HDD troubleshootingFinding possibly faulty parts TroubleshootingTroubleshooting with parts replacement in the factory Bag packaging Packaging Box packagingFraction packaging Sense data format Sense Data Collection Sense Data AnalysisSense Data Collection Sense data Error Analysis ILILSB SksvSense Data Analysis Definition of sense dataSense data 1-1x-xx, 3-1x-xx and E-1D-00 Disk read error Sense data 3-0C-03, 4-32-01, 4-40-xx, 4-C4-xx,Glossary This page is intentionally left blank Acronyms and Abbreviations Acronyms and Abbreviations Bcrc ECCMode SELECT/MODE Select IndexMtbf Mttr PADIndex This page is intentionally left blank Comment Form This page is intentionally left blank