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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Maxtor 90683U2, 91024U3, 92049U6, 91366U4, 91707U5, 92732U8 manual Gigabyte GB

91024U3, 92049U6, 90683U2, 91707U5, 92732U8 specifications

The Maxtor series of hard drives, specifically the models 91366U4, 92732U8, 91707U5, 90683U2, and 92049U6, exemplify the evolution of storage technology during the late 1990s and early 2000s, pivotal in shaping contemporary data storage solutions. These hard drives are recognized for their reliability, performance, and impressive capacities for their time.

The Maxtor 91366U4 features a storage capacity of 13.6 GB, delivering a spindle speed of 5,400 RPM. Its UATA interface allows for a fast data transfer rate, which was notable in its category. The model incorporates Advanced Power Management, contributing to lower power consumption and reduced heat generation, making it an appealing choice for system builders looking to enhance system longevity.

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