Maxtor 6800 manual THIN-FILM Media

Page 69

GLOSSARY

T

THIN-FILM HEAD Amagnetictransducermanufacturedbydepositionofmagneticandelectricalmaterials onabasematerialcontrastedwithpriorartmechanicalmethods.Read/writeheads whoseread/writeelementisdepositedusingintegratedcircuittechniquesratherthan beingmanuallywound.

THIN-FILM MEDIA

Seeplatedthinfilmmedia.

TRACK

Onesurfaceofacylinder.Apathwhichcontainsreproducibleinformationleftona magneticmediumbyrecordingmeansenergizedfromasinglechannel.

TRACK-FOLLOWING SERVO

Aclosed-looppositionercontrolsystemthatcontinuouslycorrectsthepositionofthe diskdrive’sheadsbyutilizingareferencetrackandafeedbackloopinthehead positioningsystem.(Seealsoclosedloop.)

TRACKS PER INCH (TPI)

Ameasurementofradialdensity.Tracksperinchofdiskradius.

TRACK POSITIONING

Themethod,bothmechanicalandelectrical,usedtopositiontheheadsoverthecorrect cylinderinadiskdrivesystem.

U

UN-CORRECTABLE ERROR

AnerrorthatisnotabletobeovercomewithErrorDetectionandCorrection.

UNFORMATTED CAPACITY

Storagecapacityofdiskdrivepriortoformatting;alsocalledthegrosscapacity.(See format.)Therawcapacityofadrivenottakingintoaccountthecapacitylossdueto storageoftheformatcontrolinformationonthedisksurfaces.

UNRECOVERABLE ERROR

AreaderrorfallingoutsidethecapabilityofanECCmechanismtocorrect,ornot abletobeovercomebyrereadingthedatainquestion,withorwithoutrepositioning thehead.

V

VOICE COIL MOTOR

Apositioningmotorthatusesthesameprincipleasavoicecoilinaloudspeaker.The motorhasnodetentpositions.Themechanicalmotionoutputofitcanbeeitherrotary orlinear.

W

WHITNEY HEAD

AsuccessortotheoriginalWinchesterread/writeheaddesign.Theprimarychange wastomaketheflexuresmallerandmorerigid.FirstusedinIBM3370/3380.

WHITNEY TECHNOLOGY

Amethodofconstructingaread/writeheadinarigiddiskdriveusingaWhitney head.InallotherdetailsitisthesameasWinchestertechnology.

WINCHESTER HEAD Theread/writeheadusedinWinchestertechnology,non-removablemediadisk drives.Maybeeitheramonolithicorcompositetype.Itisaerodynamicallydesigned toflywithinmicroinchesofthedisksurface.

WINCHESTER TECHNOLOGY

AmethodofconstructingarigiddiskdriveusingconceptsintroducedintheIBM model3340diskdrive.Theprimarychangesfrompriortechnologywastolowerthe massoftheslider,useofamonolithicslider,radicallychangingthedesignofthe flexureandhavingtheslidercometorestonalubricateddisksurfacewhendisk rotationceases.Inadditiontotheabove,atotallysealedchambercontainingtheread/ writeheadsanddiskswasusedtoprotectagainstcontamination.

WINDOW MARGIN

Theamountoftolerancearead/writesystemhasfortransitionjitterataspecifiederror ratelevel.

WORD

Anumberofbits,typicallyamultipleofeight,processedinparallel(inasingle operation).Standardwordlengthsare8,16,32and64bits(1,2,4,or8bytes).

WRITE

Therecordingoffluxreversalsonamagneticmedia.

WRITE PRE-COMPENSATION

Theintentionaltimeshiftingofwritedatatooffsettheeffectsofbitshiftinmagnetic recording.

WRITE GATE SIGNAL

Adigitalinputsignallevelwhichcausesthedrivecircuitrytorecord(write)data.

GL – 6

Page 68 Page 70
Image 69
Page 68 Page 70
Contents HA RD Drive Produc T MA Nual DiamondMax U T I O N Before You BeginContents Handling and Installation Product SpecificationsHost Software Interface AT Interface DescriptionInterface Commands Service and SupportGlossary Figures Maxtor Corporation IntroductionManual Organization AbbreviationsConventions Signal ConventionsKey Words NumberingProduct Description DiamondMax 6800 Key FeaturesFunctional / Interface Product FeaturesLogical Block Addressing On-the-Fly Hardware Error Correction Code ECCDefect Management Zone DMZ Software ECC CorrectionCache Management Read-Ahead ModeBuffer Segmentation Automatic Write Reallocation AWRMajor HDA Components Jumper Location/Configuration Subsystem ConfigurationCylinder Limitation Dual Drive SupportDrive Configuration Product SpecificationsPerformance Specifications Models and CapacitiesParameter Standard Metric Physical DimensionsPower Mode Definitions Power RequirementsEPA Energy Star Compliance Environmental LimitsShock and Vibration Reliability SpecificationsSafety Regulatory Compliance Radiated Electromagnetic Field Emissions EMC ComplianceCanadian Emissions Statement Hard Drive Handling Precautions Handling and InstallationPre-formatted Drive Important NoticeMulti-pack Shipping Container Unpacking and InspectionPhysical Installation Recommended Mounting ConfigurationRepacking Tools for Installation Handling PrecautionsSystem Requirements Drive Identification InformationHard Drive Identification General RequirementsInstalling 5.25-inch Mounting Brackets and Rails Systems Using Cable SelectInstalling in a Device Bay Mounting Drive in SystemAttaching System Cables Attaching Interface and Power CablesSystem Setup Setting the Bios CmosBios Cmos Parameters Hard Drive Preparation System Hangs During Boot Interface Connector AT Interface DescriptionPin 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 Features Register Error RegisterHost Software Interface Task File RegistersSector Number Register Sector Count RegisterCylinder Number Registers Device/Head RegisterCommand Register Summary Command Name Command Code Parameters Used SDHAlternate Status Register Control Diagnostic RegistersDevice Control Register Digital Input RegisterReset and Interrupt Handling Reset HandlingInterrupt Handling Set Feature Commands Interface CommandsRead Commands Read SectorsRead Verify Sectors Read Multiple Read DMASet Multiple Mode Write CommandsWrite Sectors Write Verify 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 Seek, Format and Diagnostic Commands Execute Drive DiagnosticFormat Track Execute S.M.A.R.T A.R.T. Command SetService Policy Service and SupportNo Quibble Service SupportMaxFax Service Customer ServiceInternet Glossary Access TimeCylinder Zero Gigabyte GB Logical Block Addressing Read Gate Signal THIN-FILM Media
Top Page Image Contents