IBM TotalStorage Ultrium T800, Руководство оператора

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duplex adapter. A mechanism that allows a device to
send and receive communication at the same time.
duplex transmission. Transmission in both directions,
either one direction at a time (half-duplex) or both
directions simultaneously (full-duplex).
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 .
enclosure. A device, such as a desktop unit, tape
cartridge autoloader, or tape library, into which you can
install the drive.
error log. Maintained by the drive, a list that contains
the ten most recent error codes. The codes identify
errors that pertain to the drive.
F
feature switch. Located under the drive, a bank of
eight micro switches that can be manually toggled on
or off to activate or deactivate different characteristics
of the drive.
fiber optic cable. The medium by which light is
transmitted through fibers or thin rods of glass or some
other transparent material of high refractive index.
fiber optics. A branch of optics dealing with the
transmission of light through fibers or thin rods of
glass or some other transparent material of high
refractive index.
field microcode replacement tape. A tape cartridge
that contains new or revised firmware (microcode) for
the drive.
file.
A named set of records that are stored or
processed as a unit.
filemark. Located on the magnetic tape within a tape
cartridge, a recorded element that typically marks the
organizational boundaries in a serial file structure (such
as directory boundaries) and that is requested to be
written or read by the server.
firmware. The proprietary code that is usually
delivered as part of an operating system. Firmware is
more efficient than software that is loaded from an
alterable medium, and is 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 .
foot. A unit of length comprising 12 inches.
G
Gb.
See gigabit .
GB. See gigabyte .
Generation 1. The informal name for the IBM Ultrium
Internal Tape Drive, which is the predecessor of the
drive (Generation 2). The Generation 1 drive has a
native storage capacity of up to 100 GB per cartridge
and a native sustained data transfer rate of 15 MB per
second.
Generation2. The informal name for the drive, which
is the second-generation version of the IBM Ultrium
Internal Tape Drive (Generation 1). The Generation 2
drive has a native storage capacity of up to 200 GB per
cartridge and a native sustained data transfer rate of 35
MB per second.
Generation 3. The informal name for the drive, which
is the third-generation version of the IBM Ultrium
Internal Tape Drive (Generation 1). The Generation 3
drive has a native storage capacity of up to 400 GB per
cartridge and a native sustained data transfer rate of
135 MB per second.
gigabit (Gb). 1 000 000 000 bits. 1 Gb equals 100 MB.
gigabyte (GB). 1 000 000 000 bytes.
ground.
An object that makes an electrical connection
with the earth.
H
hard addressing.
Pertaining to the Fibre Channel
drive (Model T400F), a method that identifies the
drive’s LID and, consequently, its AL_PA (the AL_PA
enables the drive to communicate with other devices).
hardware.
The physical equipment or devices that
form a computer.
head. See drive head .
Head Resistance Measurements test. Part of the Test
Head diagnostic, a procedure that determines whether
the tape drive’s head works correctly. The test measures
the head’s ability to withstand cracks and other defects.
host. The controlling or highest-level system in a data
communication configuration. Synonymous with server .
hot-pluggable. Pertaining to the drive, the ability to
remove the drive from an enclosure while the enclosure
is powered-on.
Glossary
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