Fujitsu MBB2073RC, MBB2147RC Defect Management, Alternate block allocation by Format Unit command

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3.3 Defect Management

(1)Alternate block allocation during FORMAT UNIT command execution

When the FORMAT UNIT command is specified, the allocation of the alternate block to those defective sectors included in the defect lists (P, G, or D) is continued until all spare sectors in the same cell are used up. When they are used up, unused spare sectors in the alternate cylinder are allocated to the defective sectors that follow the sector by means of alternate sector treatment. Figure 3.7 is examples of the alternate block allocation during the FORMAT UNIT command execution.

: n represents a logical data block number

: Defective sector

: Unused spare sector

Figure 3.7 Alternate block allocation by FORMAT UNIT command

During FORMAT UNIT command, alternate block allocation is conducted in following cases:

1)Unrecovered write offtrack condition during a media write

2)Uncorrectable Data Error during a media read (certification) *1

C141-E257

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Contents MBB2147RC MBB2073RC Hard Disk Drives Product Manual For Safe Operation Revision Record Related Standards Overview of Manual PrefaceConventions for Alert Messages PrefaceImportant Alert Messages Important Alert ItemsData loss Important Alert ItemsSAS Interface Manual Manual Organization Product ManualThis page is intentionally left blank Contents Contents InstallationError Analysis Figures Tables This page is intentionally left blank Standard Features Standard Features Hardware Structure System ConfigurationGeneral 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 Function specifications SpecificationsMBB2147RC MBB2073RC 60/62 MeeprmlSeek time ms Seek difference 4096 Cly/div Hardware SpecificationsEnvironmental/Power requirements Environmental specificationsMtbf = Error rateReliability Specifications Data Space Cylinder configurationData Space Logical Data Block Addressing Defect Management Data Format Data Space Spare area in cell Alternate spare areaTrack format Sector format Track skew/head skewData Space Format capacity Logical Data Block Addressing Alternate block allocation Defect Management Defect listDefect Management Alternate block allocation by Format Unit commandAlternate block allocation by Reassign Blocks command Write Write Extend Write Write Extended Format Unit Mounting Requirements Dimensions Installation RequirementsMounting orientations Installation RequirementsMounting frame structure example Mounting RequirementsVent hole location MPU Surface temperature check point and maximum temperatureHDC +5VDC MBB2147RC MBB2073RC Current waveform Max seek Power Supply RequirementsInterface connector CN1 power lines included Connection Requirements Interface connectorInterface 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 Arre AwreRetry Count AT Verification Arre Awre PERDisc Disable PRE-FETCH Transfer Length Xffff Minimum PRE-FETCHMaximum PRE-FETCH Maximum PRE-FETCH Ceiling Xffff Number of Cache SegmentsReady LED Meaning Self-diagnostic functions Diagnostics Self-diagnosticsDiagnostics and Maintenance Diagnostics Test programs Precautions MaintenanceMaintenance requirements Tools and test equipment Maintenance levelsTests Test flowchartOperation Check Diagnostic testOperation Check Initial seek operation check Operation testTroubleshooting with HDD replacement in the field Troubleshooting Outline of troubleshooting proceduresSystem-level field troubleshooting TroubleshootingHDD troubleshooting Troubleshooting at the repair siteFinding possibly faulty parts TroubleshootingTroubleshooting with parts replacement in the factory Bag packaging Box packaging PackagingFraction packaging Sense data format Sense Data Collection Sense Data AnalysisSense Data Collection Sense data ILI Error AnalysisLSB SksvDefinition of sense data Sense Data AnalysisSense data 3-0C-03, 4-32-01, 4-40-xx, 4-C4-xx, Sense data 1-1x-xx, 3-1x-xx and E-1D-00 Disk read errorGlossary This page is intentionally left blank Acronyms and Abbreviations Acronyms and Abbreviations ECC BcrcIndex Mode SELECT/MODE SelectMtbf Mttr PADIndex This page is intentionally left blank Comment Form This page is intentionally left blank