IBM 3580-L11 Setup Guide - Page 104

High Voltage Differential HVD/DIFF., Input/Output System BIOS in read-only memory

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current. The quantity of charge per unit of time, measured in Amperes (Amps, A). D data. Any representations such as characters or analog quantities to which meaning is, or might be, assigned. data cartridge. A tape cartridge dedicated to storing data. Contrast with cleaning cartridge. data compression. See compression. data transfer rate. The average number of bits, characters, or blocks per unit of time passing between corresponding equipment in a data transmission system. The rate is expressed in bits, characters, or blocks per second, minute, or hour. dc. Direct current. degauss. To make a magnetic tape nonmagnetic by means of electrical coils carrying currents that neutralize the magnetism of the tape. degausser. A device that makes magnetic tape nonmagnetic. device. Any hardware component or peripheral, such as a tape drive or tape library, that can receive and send data. device driver. A file that contains the code needed to use an attached device. diagnostic. A software program that is designed to recognize, locate, and explain faults in equipment or errors in programs. differential. See High Voltage Differential (HVD/DIFF). direct current (dc). An electric current flowing in one direction only and substantially constant in value. download. To transfer programs or data from a computer to a connected device, typically a personal computer. drive. See IBM Ultrium Tape Drive. drive dump. The recording, at a particular instant, of the contents of all or part of one storage device into another storage device. drive head. The component that records an electrical signal onto magnetic tape, or reads a signal from tape into an electrical signal. E eject. To remove or force out from within. electronic mail. Correspondence in the form of messages transmitted between user terminals over a computer network. e-mail. See electronic mail. error code log. A repository within a tape drive's firmware that contains a history of errors experienced by the drive. F field microcode replacement (FMR) tape. A tape cartridge that contains new or revised firmware (microcode) for the IBM Ultrium Tape Drive. file. A named set of records stored or processed as a unit. file transfer protocol (FTP). In the Internet suite of protocols, an application layer protocol that uses TCP and Telnet services to transfer bulk-data files between machines or hosts. firmware. Proprietary code that is usually delivered as firmware as part of an operating system. Firmware is more efficient than software loaded from an alterable medium and more adaptable to change than pure hardware circuitry. An example of firmware is the Basic Input/Output System (BIOS) in read-only memory (ROM) on a PC motherboard. FMR tape. See field microcode replacement tape. FTP site. Any electronic repository of information that uses the File Transfer Protocol (FTP) for transferring files to and from servers. Use of an FTP site requires a user ID and possibly a password. G GB. Gigabyte. gigabyte (GB). 1 000 000 000 bytes. grounded. Having or making an electrical connection with the earth. H head. See drive head. hertz (Hz). A unit of frequency equal to one cycle per second. High Voltage Differential (HVD/DIFF). A logic signaling system that enables data communication between a supported host and another device, such as the 3580 Tape Drive. HVD/DIFF signaling uses a paired plus and minus signal level to reduce the effects of noise on the SCSI bus. Any noise injected into the 88 IBM 3580 Tape Drive Setup, Operator, and Service Guide

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current.
The quantity of charge per unit of time,
measured in Amperes (Amps, A).
D
data.
Any representations such as characters or
analog quantities to which meaning is, or might be,
assigned.
data cartridge.
A tape cartridge dedicated to storing
data. Contrast with
cleaning cartridge
.
data compression.
See
compression
.
data transfer rate.
The average number of bits,
characters, or blocks per unit of time passing between
corresponding equipment in a data transmission system.
The rate is expressed in bits, characters, or blocks per
second, minute, or hour.
dc.
Direct current.
degauss.
To make a magnetic tape nonmagnetic by
means of electrical coils carrying currents that neutralize
the magnetism of the tape.
degausser.
A device that makes magnetic tape
nonmagnetic.
device.
Any hardware component or peripheral, such
as a tape drive or tape library, that can receive and
send data.
device driver.
A file that contains the code needed to
use an attached device.
diagnostic.
A software program that is designed to
recognize, locate, and explain faults in equipment or
errors in programs.
differential.
See
High Voltage Differential (HVD/DIFF)
.
direct current (dc).
An electric current flowing in one
direction only and substantially constant in value.
download.
To transfer programs or data from a
computer to a connected device, typically a personal
computer.
drive.
See
IBM Ultrium Tape Drive
.
drive dump.
The recording, at a particular instant, of
the contents of all or part of one storage device into
another storage device.
drive head.
The component that records an electrical
signal onto magnetic tape, or reads a signal from tape
into an electrical signal.
E
eject.
To remove or force out from within.
electronic mail.
Correspondence in the form of
messages transmitted between user terminals over a
computer network.
e-mail.
See
electronic mail
.
error code log.
A repository within a tape drive’s
firmware that contains a history of errors experienced by
the drive.
F
field microcode replacement (FMR) tape.
A tape
cartridge that contains new or revised firmware
(microcode) for the
IBM Ultrium Tape Drive
.
file.
A named set of records stored or processed as a
unit.
file transfer protocol (FTP).
In the Internet suite of
protocols, an application layer protocol that uses TCP
and Telnet services to transfer bulk-data files between
machines or hosts.
firmware.
Proprietary code that is usually delivered as
firmware as part of an operating system. Firmware is
more efficient than software loaded from an alterable
medium and more adaptable to change than pure
hardware circuitry. An example of firmware is the Basic
Input/Output System (BIOS) in read-only memory
(ROM) on a PC motherboard.
FMR tape.
See
field microcode replacement tape
.
FTP site.
Any electronic repository of information that
uses the File Transfer Protocol (FTP) for transferring
files to and from servers. Use of an FTP site requires a
user ID and possibly a password.
G
GB.
Gigabyte.
gigabyte (GB).
1 000 000 000 bytes.
grounded.
Having or making an electrical connection
with the earth.
H
head.
See
drive head
.
hertz (Hz).
A unit of frequency equal to one cycle per
second.
High Voltage Differential (HVD/DIFF).
A logic
signaling system that enables data communication
between a supported host and another device, such as
the 3580 Tape Drive. HVD/DIFF signaling uses a paired
plus and minus signal level to reduce the effects of
noise on the SCSI bus. Any noise injected into the
88
IBM 3580 Tape Drive Setup, Operator, and Service Guide