Fujitsu MBB2073RC, MBB2147RC manual Data Space

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3.1 Data Space

Each sector on the track consists of the following fields:

(1)Gaps (G1, G2, G3)

No pattern is written on the gap field.

(2)PLO Sync

In this field, pattern X'00' is written.

(3)Sync Mark (SM1, SM2)

In this field, special pattern is written. This special pattern indicates the beginning of the data field.

(4)Data field (DATA1-DATA4)

User data is stored in the data field of the sector. The length of the data field is equal to that of the logical data block which is specified with a parameter in the MODE SELECT command. Any multiple of 4 between 512 and 528 bytes can be specified as the length.

(5)BCRC

It is a 4-byte error detection code. Single burst errors with lengths of up to 32 bits for each logical block can be detected.

(6)ECC

This is the 400 bits code that allows detection and correction of errors in the data field, which is capable of correcting the single burst error up to 200 bits max. on the fly.

(7)PAD

A specified length of x‘00’ pattern is written in this field. This field includes the variation by rotation and circuit delay till reading/writing.

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 Hardware Specifications Model name and order number Hardware SpecificationsModel names and order numbers Function specifications SpecificationsMBB2147RC MBB2073RC 60/62 MeeprmlSeek time ms Seek difference 4096 Cly/div Hardware SpecificationsEnvironmental/Power requirements Environmental specificationsReliability Error rateMtbf = Specifications Data Space Logical Data Block Addressing Defect Management Cylinder configurationData Space 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 HDC Surface temperature check point and maximum temperatureMPU +5VDC MBB2147RC MBB2073RC Current waveform Max seek Power Supply RequirementsInterface connector CN1 power lines included Connection Requirements Interface connectorInterface connector SAS plug signal allocationCN1 Connector requirements Ready LED output signalRecommended connectors This page is intentionally left blank Installation Installation Setting Port Address SettingMounting HDDs Mounting procedures 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 siteTroubleshooting with parts replacement in the factory TroubleshootingFinding possibly faulty parts Bag packaging Box packaging PackagingFraction packaging Sense Data Collection Sense data Sense Data Collection Sense Data AnalysisSense data format 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