Maxtor 2B010H1 Frequency response, Gigabyte GB, Hard error, Hard sectored, Head crash, Index

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GLOSSARY

frequency response

A measure of how effectively a circuit or device transmits the different frequencies applied to it. In disk and tape drives this refers to the read/write channel. In disk drives, it can also refer to the dynamic mechanical characteristics of a positioning system.

G

gigabyte (GB)

One billion bytes (one thousand megabytes) or 10E9.

H

hard error

An error that is not able to be overcome by repeated readings and repositioning means.

hard sectored

A technique where a digital signal indicates the beginning of a sector on a track. This is contrasted to soft sectoring, where the controller determines the beginning of a sector by the reading of format information from the disk.

head

The electromagnetic device that write (records), reads (plays back), and erases data on a magnetic media. It contains a read core(s) and/or a write core(s) and/or erase core(s) which is/are used to produce or receive magnetic flux. Sometimes the term is all inclusive to mean the carriage assembly which includes the slider and flexure.

head crash

The inadvertent touching of a disk by a head flying over the disk (may destroy a portion of the media and/or the head).

head disk assembly (HDA)

The mechanical portion of a rigid, fixed disk drive. It usually includes disks, heads, spindle motor, and actuator.

head loading zone

The non-data area on the disk set aside for the controlled takeoff and landing of the Winchester heads when the drive is turned on and off. Dedicated annulus on each disk surface in which heads are loaded, unloaded, or flying height is established. Head-disk contact may occur in some instances; no data is recorded in this area.

head positioner

Also known as actuator, a mechanism that moves the arms that carry read/write heads to the cylinder being accessed.

I

index

Similar to a directory, but used to establish a physical to logical cross reference. Used to update the physical disk address (tracks and sectors) of files and to expedite accesses.

inside diameter

The smallest radial position used for the recording and playback of flux reversals on a magnetic disk surface.

initialization

Applying input patterns or instructions to a device so that all operational parameters are at a known value.

input

Data entering the computer to be processed; also user commands.

input/output (I/O)

The process of entering data into or removing data from a computer system or a peripheral device.

intelligent peripheral

A peripheral device that contains a processor or microprocessor to enable it to interpret and execute commands.

interface

The data transmitters, data receivers, logic, and wiring that link one piece of computer equipment to another, such as a disk drive to a controller or a controller to a system bus.

interface standard

The interface specifications agreed to by various manufacturers to promote industry-wide interchangeability of products such as a disk drive. Interface standards generally reduce product costs, allows buyers to purchase from more than one source, and allow faster market acceptance of new products.

interleave

An ordering of physical sectors to be skipped between logical sectors on your hard disk.

I/O processor

Intelligent processor or controller that handles the input/ output operations of a computer.

interrupt

A signal, usually from a subsystem to a central processing unit, to signify that an operation has been completed or cannot be completed.

J

jumper

A small piece of plastic that slides over pairs of pins that protrude from the circuit board on the hard drive to make an electrical connection and activate a specific option.

K

kilobyte (KB)

A unit of measure of approximately 1,000 bytes. (However, because computer memory is partitioned into sizes that are a power of two, a kilobyte is really 1,024 bytes.)

L

landing zone or Lzone

The cylinder number/location to where the read/write head(s) move upon power down.

late bit

A bit that is in the late half of the data window.

GL – 4

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Contents Maxtor 541DX Product Manual U T I O N Before You BeginContents Handling and Installation Product SpecificationsAT Interface Description Interface CommandsHost Software Interface Glossary Service and SupportFigures MaxtorCorporation IntroductionManualOrganization AbbreviationsConventions ProductDescription Key FeaturesFunctional / Interface Product FeaturesModels CYL SP T MAX LBA Capacity CacheManagement Major HDA Components Jumper Location / Configuration SubsystemConfigurationJumper Configuration Cylinder Limitation Jumper DescriptionDrive Configuration ProductSpecificationsPerformanceSpecifications Models and CapacitiesParam Eter Valu E Physical DimensionsPower Mode Definitions PowerRequirementsEPA Energy Star Compliance Environmental LimitsShock and Vibration Reliability SpecificationsParam Eter Oper AT ING ON- Oper AT ING EMC/EMI Safety Regulatory ComplianceHard Drive Handling Precautions HandlingandInstallationElectro-Static Discharge ESD Multi-pack Shipping Container Unpacking and InspectionRepacking Physical InstallationHook up Before You BeginStart up Set upATInterfaceDescription InterfaceConnectorPinDescriptionSummary PIN IGN ALPin Description Table PIN Name Signal Name Signal Desc RiptionPIO Timing IM in G Paramet ERS ModeDMATiming Imin G Paramet ERS ModeMode Ultra DMA TimingSustained 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 HostSoftwareInterfacePOR T EAD WR ITE Conten TS LBA Bits Seek, Format, and Diagnostic Commands CommandRegisterM M a N D N a M E M M a N D code PA R a M E T E R S U S E D SummaryControl Diagnostic Registers Reset and Interrupt Handling InterfaceCommands ReadCommands Read DMA WriteCommands Write Multiple VAL UE DES C RIP Tion ModeSet/CheckCommandsEC TOR LE VE L VAL UE Omman D Timer VAL UE TIME-OUT Period PowerModeCommandsSleep Mode Or D ENT Desc Ription InitializationCommandsOr D 15- 10, as c urrently defined Initialize Drive Parameters ER ROR Code Desc Ription Seek,FormatandDiagnosticCommandsKey Register A.R.T. CommandSetService Policy ServiceandSupportNo Quibble Service Product SupportFrom Dial Glossary Central processing unit CPU Correctable errorChannel CharacterDirect memory access DMA Direct accessError correction code ECC Error freeHead disk assembly HDA Hard errorFrequency response Gigabyte GBLatency Late windowLogic Logical addressPhase margin Phase locked loop PLLRandom access memory RAM Read gate signalSeek complete signal Sector pulse signalSequential access Soft errorUn-correctable error Strobe offset signalUnrecoverable error Write gate signal
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