Quantum Audio Travan 40 Tape Drive STT3401A User Manual

Page 133

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Glossary

Appendix A

Seagate Travan 40 Product Manual

Page 125

(slave). 0=select drive 0 (master)

DIRECTORY

A table of contents to the various files stored on a computer device
(such as a tape or hard disc).

DIRECTORY
TRACK

The track at the centerline of a tape, identified as track 254 by its Track
ID frame.

DMA

Direct Memory Access. The ability to transfer data to/from main
memory without the direct involvement of the Host processor.

DMA CHANNEL

An individual DMA data path. There may be several within a computer
system.

DMA MODE

There are several ‘styles’ of DMA protocol and data rates.

See SINGLE-WORD DMA, MULTI-WORD DMA, and ULTRA DMA

DRDY

ATAPI Status register bit: Device Ready

This indicates that the device is ready to accept commands.

DRIVE

This is a short term for disc drive or tape drive.

DRQ

ATAPI Status register bit: Data ReQuest

This indicates that the device is ready to transfer data to/from the Host.

DSC

ATAPI Status register bit: Disk Seek Complete

EARLY
WARNING

Early Warning marker indicates the end of the permissible recording
area.

ECC

(Error Correction Code) Special drive generated information that can
be used to correct bad blocks.

ECC BLOCK

A block containing drive-generated ECC data in its data field and part
of control field.

ECMA

European Computer Manufacturers Association

EEPROM

Electronically Erasable, Programmable Read-Only Memory

EIDE

Extended IDE

EISA BUS

Extended ISA bus

EOT

End of Tape marker indicating the end of tape.

EOD

(End of Data) Indicates the point where the host stopped writing data to
the tape.

EOM

End of Media

EOT

End of Tape

ERASE

To remove all magnetically recorded information from the tape.

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