Maxtor 5T010H1 Bedienungsanleitung PDF herunterladen (Seite 64)

GLOSSARY

GL – 6

SOFT ERRORSOFT ERROR

SOFT ERROR

A data error which can be overcome by rereading the data or

repositioning the head.

SOFT SECTOREDSOFT SECTORED

SOFT SECTORED

A technique where the controller determines the beginning of a

sector by the reading of format information from the disk. This is

contrasted to hard sectoring where a digital signal indicates the

beginning of a sector on a track.

SOFTWARESOFTWARE

SOFTWARE

Applications programs, operating systems, and other programs (as

opposed to hardware).

SPINDLESPINDLE

SPINDLE

The rotating hub structure to which the disks are attached.

SPINDLE MOTORSPINDLE MOTOR

SPINDLE MOTOR

The motor that rotates the spindle and therefore the disks.

SPUTTERED MEDIASPUTTERED MEDIA

SPUTTERED MEDIA

Magnetic disk or tape that has the magnetic layer deposited by

sputtering means.

STEPPER MOTORSTEPPER MOTOR

STEPPER MOTOR

A motor that has known detent positions where the rotor will stop

with the proper control in some cases. The digitally controlled motor

moves the head positioner from track to track in small, step-like

motions.

STORAGE CAPACITYSTORAGE CAPACITY

STORAGE CAPACITY

The amount of data that can be stored in a memory location, usually

specified in kilobytes for main memory and floppy drives and

megabytes for mass storage devices.

STORAGE DENSITYSTORAGE DENSITY

STORAGE DENSITY

Usually refers to recording density (BPI, TPI, or a combination of the

two.)

STORAGE LOCATIONSTORAGE LOCATION

STORAGE LOCATION

A memory location, identified by an address where information may

be read or written.

STROBE OFFSET SIGNALSTROBE OFFSET SIGNAL

STROBE OFFSET SIGNAL

A group of digital input signal levels which cause the read PLL and/

or data decoder to shift the decoding windows by fractional

amounts. Often early/late are modified when two signals are used.

THIN-FILM HEADTHIN-FILM HEAD

THIN-FILM HEAD

A magnetic transducer manufactured by deposition of magnetic and

electrical materials on a base material contrasted with prior art

mechanical methods. Read/write heads whose read/write element is

deposited using integrated circuit techniques rather than being

manually wound.

THIN-FILM MEDIATHIN-FILM MEDIA

THIN-FILM MEDIA

See plated thin film media.

TRACKTRACK

TRACK

One surface of a cylinder. A path which contains reproducible

information left on a magnetic medium by recording means

energized from a single channel.

TRACK-FOLLOWING SERVOTRACK-FOLLOWING SERVO

TRACK-FOLLOWING SERVO

A closed-loop positioner control system that continuously corrects

the position of the disk drive’s heads by utilizing a reference track

and a feedback loop in the head positioning system. (See also

closed loop.)

TRACKS PER INCH (TPI)TRACKS PER INCH (TPI)

TRACKS PER INCH (TPI)

A measurement of radial density. Tracks per inch of disk radius.

TRACK POSITIONINGTRACK POSITIONING

TRACK POSITIONING

The method, both mechanical and electrical, used to position the

heads over the correct cylinder in a disk drive system.

UN-CORRECTABLE ERRORUN-CORRECTABLE ERROR

UN-CORRECTABLE ERROR

An error that is not able to be overcome with Error Detection and

Correction.

UNFORMATTED CAPACITYUNFORMATTED CAPACITY

UNFORMATTED CAPACITY

Storage capacity of disk drive prior to formatting; also called the

gross capacity. (See format.) The raw capacity of a drive not taking

into account the capacity loss due to storage of the format control

information on the disk surfaces.

UNRECOVERABLE ERRORUNRECOVERABLE ERROR

UNRECOVERABLE ERROR

A read error falling outside the capability of an ECC mechanism to

correct, or not able to be overcome by rereading the data in

question, with or without repositioning the head.

VOICE COIL MOTORVOICE COIL MOTOR

VOICE COIL MOTOR

A positioning motor that uses the same principle as a voice coil in a

loudspeaker. The motor has no detent positions. The mechanical

motion output of it can be either rotary or linear.

WHITNEY HEADWHITNEY HEAD

WHITNEY HEAD

A successor to the original Winchester read/write head design. The

primary change was to make the flexure smaller and more rigid. First

used in IBM 3370/3380.

WHITNEY TECHNOLOGYWHITNEY TECHNOLOGY

WHITNEY TECHNOLOGY

A method of constructing a read/write head in a rigid disk drive

using a Whitney head. In all other details it is the same as

Winchester technology.

WINCHESTER HEADWINCHESTER HEAD

WINCHESTER HEAD

The read/write head used in Winchester technology, non-removable

media disk drives. May be either a monolithic or composite type. It is

aerodynamically designed to fly within microinches of the disk

surface.

WINCHESTER TECHNOLOGYWINCHESTER TECHNOLOGY

WINCHESTER TECHNOLOGY

A method of constructing a rigid disk drive using concepts

introduced in the IBM model 3340 disk drive. The primary changes

from prior technology was to lower the mass of the slider, use of a

monolithic slider, radically changing the design of the flexure and

having the slider come to rest on a lubricated disk surface when disk

rotation ceases. In addition to the above, a totally sealed chamber

containing the read/write heads and disks was used to protect

against contamination.

WINDOW MARGINWINDOW MARGIN

WINDOW MARGIN

The amount of tolerance a read/write system has for transition jitter

at a specified error rate level.

WORDWORD

WORD

A number of bits, typically a multiple of eight, processed in parallel

(in a single operation). Standard word lengths are 8, 16, 32 and 64

bits (1, 2, 4, or 8 bytes).

WRITEWRITE

WRITE

The recording of flux reversals on a magnetic media.

WRITE PRE-COMPENSATIONWRITE PRE-COMPENSATION

WRITE PRE-COMPENSATION

The intentional time shifting of write data to offset the effects of bit

shift in magnetic recording.

WRITE GATE SIGNALWRITE GATE SIGNAL

WRITE GATE SIGNAL

A digital input signal level which causes the drive circuitry to record

(write) data.

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