Maxtor 5120 manual Gigabyte GB

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FILE ALLOCATION TABLE (FAT)

Allocatesspaceonthediskforfiles,oneclusteratatime;locksoutunusableclusters; identifiesunused(free)area;andlistsafile’slocation.WithtwoFAT’spresent,the secondcopyensuresconsistencyandprotectsagainstlossofdataifoneofthesectorson thefirstFATisdamaged.

FLUX CHANGES PER INCH

Synonymouswithfrpi(fluxreversalsperinch).OnlyinMFMrecordingdoes1fci equal1bpi(bitperinch).Inrun-length-limitedencodingschemes,generally1fci equals1.5bpi.

FORMAT

Inadiskdrive,thearrangementofdataonastoragemedia.Astandard5.25-inchdisk formatconsistsof17,26,or36sectorspertrack,and512bytesofdatapersector,plus identification,errorcorrection,andotherbytesnecessaryforaccessingand synchronizingdata.

FORMATTED CAPACITY

Theactualcapacityavailabletostoredatainamassstoragedevice.Theformatted capacityisthegrosscapacity,lessthecapacitytakenupbytheoverheaddatausedin formattingthesectors.

FREQUENCY MODULATION

Arecordingcode.Afluxreversalatthebeginningofacelltimerepresentsclockbit;a “1”bitisafluxreversalatthecenterofthecelltime,anda“0”bitisanabsenceofa fluxreversal.

FREQUENCY RESPONSE

Ameasureofhoweffectivelyacircuitordevicetransmitsthedifferentfrequencies appliedtoit.Indiskandtapedrivesthisreferstotheread/writechannel.Indisk drives,itcanalsorefertothedynamicmechanicalcharacteristicsofapositioning system.

G

GIGABYTE (GB)

Onebillionbytes(onethousandmegabytes)or109.

H

HARD ERROR

Anerrorthatisnotabletobeovercomebyrepeatedreadingsandrepositioningmeans.

HARD SECTORED

Atechniquewhereadigitalsignalindicatesthebeginningofasectoronatrack.Thisis contrastedtosoftsectoring,wherethecontrollerdeterminesthebeginningofasector bythereadingofformatinformationfromthedisk.

HEAD

Theelectromagneticdevicethatwrite(records),reads(playsback),anderasesdataona magneticmedia.Itcontainsareadcore(s)and/orawritecore(s)and/orerasecore(s) whichis/areusedtoproduceorreceivemagneticflux.Sometimesthetermisall inclusivetomeanthecarriageassemblywhichincludesthesliderandflexure.

HEAD CRASH

Theinadvertenttouchingofadiskbyaheadflyingoverthedisk(maydestroya portionofthemediaand/orthehead).

HEAD DISK ASSEMBLY (HDA)

Themechanicalportionofarigid,fixeddiskdrive.Itusuallyincludesdisks,heads, spindlemotor,andactuator.

HEAD LOADING ZONE

Thenon-dataareaonthedisksetasideforthecontrolledtakeoffandlandingofthe Winchesterheadswhenthedriveisturnedonandoff.Dedicatedannulusoneachdisk surfaceinwhichheadsareloaded,unloaded,orflyingheightisestablished.Head-disk contactmayoccurinsomeinstances;nodataisrecordedinthisarea.

HEAD POSITIONER

Alsoknownasactuator,amechanismthatmovesthearmsthatcarryread/writeheads tothecylinderbeingaccessed.

I

INDEX

Similartoadirectory,butusedtoestablishaphysicaltologicalcrossreference.Usedto updatethephysicaldiskaddress(tracksandsectors)offilesandtoexpediteaccesses.

GLOSSARY

INSIDE DIAMETER

Thesmallestradialpositionusedfortherecordingandplaybackoffluxreversalsona magneticdisksurface.

INITIALIZATION

Applyinginputpatternsorinstructionstoadevicesothatalloperationalparametersare ataknownvalue.

INPUT

Dataenteringthecomputertobeprocessed;alsousercommands.

INPUT/OUTPUT (I/O)

Theprocessofenteringdataintoorremovingdatafromacomputersystemora peripheraldevice.

INTELLIGENT PERIPHERAL

Aperipheraldevicethatcontainsaprocessorormicroprocessortoenableittointerpret andexecutecommands.

INTERFACE

Thedatatransmitters,datareceivers,logic,andwiringthatlinkonepieceofcomputer equipmenttoanother,suchasadiskdrivetoacontrolleroracontrollertoasystem bus.

INTERFACE STANDARD

Theinterfacespecificationsagreedtobyvariousmanufacturerstopromoteindustry- wideinterchangeabilityofproductssuchasadiskdrive.Interfacestandardsgenerally reduceproductcosts,allowsbuyerstopurchasefrommorethanonesource,andallow fastermarketacceptanceofnewproducts.

INTERLEAVE

Anorderingofphysicalsectorstobeskippedbetweenlogicalsectorsonyourhard disk.

I/O PROCESSOR

Intelligentprocessororcontrollerthathandlestheinput/outputoperationsofa computer.

INTERRUPT

Asignal,usuallyfromasubsystemtoacentralprocessingunit,tosignifythatan operationhasbeencompletedorcannotbecompleted.

J

JUMPER

Asmallpieceofplasticthatslidesoverpairsofpinsthatprotrudefromthecircuitboard ontheharddrivetomakeanelectricalconnectionandactivateaspecificoption.

K

KILOBYTE (KB)

Aunitofmeasureofapproximately1,000bytes.(However,becausecomputer memoryispartitionedintosizesthatareapoweroftwo,akilobyteisreally1,024 bytes.)

L

LANDING ZONE OR LZONE

ThecylindernumbertowhereParkHeadsmovetheread/writeheads.

LATE BIT

Abitthatisinthelatehalfofthedatawindow.

LATE WINDOW

Adatawindowthathasbeenshiftedinalatedirectiontofacilitatedatarecovery.

LATENCY

Adelayencounteredinacomputerwhenwaitingforaspecificresponse.Inadisk drivethereisbothseeklatencyandrotationallatency.Thetimerequiredforthe addressedsectortoarriveundertheheadaftertheheadispositionedoverthecorrect track.Itisaresultofthedisk’srotationalspeedandmustbeconsideredindetermining thediskdrive’stotalaccesstime.

LOGIC

Electroniccircuitrythatswitchesonandoff(“1”and“0”)toperformfunctions.

GL – 3

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Contents HA RD Drive Produc T MA Nual 92048U8, 91792U7, 91536U6, 91280U5, 91024U4 and 90750U3 DiamondMax PlusRevisions Manual No U T I O N Before You BeginContents Handling and Installation Product SpecificationsHost Software Interface AT Interface DescriptionService and Support Interface CommandsGlossary Figures Abbreviations IntroductionMaxtor Corporation Manual OrganizationNumbering Signal ConventionsConventions Key WordsProduct Description DiamondMax Plus 5120 Key FeaturesFunctional / Interface Product FeaturesSoftware ECC Correction On-the-Fly Hardware Error Correction Code ECCLogical Block Addressing Defect Management Zone DMZAutomatic Write Reallocation AWR Read-Ahead ModeCache Management Buffer SegmentationMajor HDA Components Dual Drive Support Subsystem ConfigurationJumper Location/Configuration Cylinder LimitationModels and Capacities Product SpecificationsDrive Configuration Performance SpecificationsParameter Standard Metric Physical DimensionsEnvironmental Limits Power Requirements AveragePower Mode Definitions EPA Energy Star ComplianceShock and Vibration Reliability SpecificationsRadiated Electromagnetic Field Emissions EMC Compliance Safety Regulatory ComplianceCanadian Emissions Statement Important Notice Handling and InstallationHard Drive Handling Precautions Pre-formatted DriveMulti-pack Shipping Container Unpacking and InspectionRecommended Mounting Configuration Physical InstallationRepacking Drive Identification Information Handling PrecautionsTools for Installation System RequirementsHard Drive Identification General RequirementsMounting Drive in System Systems Using Cable SelectInstalling 5.25-inch Mounting Brackets and Rails Installing in a Device BayAttaching System Cables Attaching Interface and Power CablesSetting the Bios Cmos System SetupBios Cmos Parameters Hard Drive Preparation System Hangs During Boot AT Interface Description Interface ConnectorPin Description Summary Pin Description Table PIN Name Signal Name Signal DescriptionPIO Timing Timing Parameters ModeDMA Timing Ultra DMA Timing Mode MIN MAXSustained Ultra DMA Data In Burst Device Terminating an Ultra DMA Data In Burst Initiating an Ultra DMA Data Out Burst Device Pausing an Ultra DMA Data Out Burst Device Terminating an Ultra DMA Data Out Burst Task File Registers Error RegisterFeatures Register Host Software InterfaceDevice/Head Register Sector Count RegisterSector Number Register Cylinder Number RegistersCommand Register Summary Command Name Command Code Parameters Used SDHDigital Input Register Control Diagnostic RegistersAlternate Status Register Device Control RegisterReset Handling Reset and Interrupt HandlingInterrupt Handling Set Feature Commands Interface CommandsRead Sectors Read CommandsRead Verify Sectors Read Multiple Read DMAWrite Verify Sectors Write CommandsSet Multiple Mode Write SectorsWrite DMA Write MultipleSet Features Mode Set Feature CommandsPower Mode Commands Sleep Mode Identify Drive Initialization Commands15-8 = PIO data transfer mode = Write Cache enabled Initialize Drive Parameters Execute Drive Diagnostic Seek, Format and Diagnostic CommandsFormat Track Execute S.M.A.R.T A.R.T. Command SetSupport Service and SupportService Policy No Quibble ServiceCustomer Service MaxFax ServiceInternet Glossary Access TimeCylinder Zero Gigabyte GB Logical Block Addressing Read Gate Signal THIN-FILM Media
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