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95693 Revision P Glossary-3
Glossary
offline (1) Neither controlled by, nor
communicating with, a computer. Contrast with
online. (IBM)
(2) Not active or available for access in a system.
online (1) Pertaining to the operation of a
functional unit when under the direct control of
the computer. Contrast with offline. (T)
(2) Active and available for access in a system.
R
robot Electromechanical device for locating and
moving cartridges.
S
SCSI See small computer systems interface.
SD-3 A high-performance information storage
and retrieval system that reads and writes in
helical-scan format. Also referred to as RedWood.
servo A device that uses closed-loop feedback to
govern physical positioning.
small computer systems interface (SCSI) A
local interface operating over a wide range of
transfer rates using a common command set for all
devices attached to the interface. It connects host
computer systems to a variety of peripheral
devices.
T
T9840 A two-reel (supply and take-up reels) tape
drive that reads from and writes to magnetic tapes.
T9940 A single-reel tape drive that reads from and
writes to magnetic tapes..
T9x40 A term used to denote T9840 and/or
T9940 when the specific drive or tape cartridge is
not important.
tape drive An electromechanical device that
moves magnetic tape and includes the mechanisms
for writing and reading data to and from the tape.
V
VolSafe A Sun StorageTek feature that provides
write once, read many (WORM) technology to
VolSafe-designated tape cartridges. VolSafe only
permits new data to be appended to date currently
on the tape. Once written, the data cannot be
overwritten.
VOLSER See volume serial label.
volume A data carrier that mounts and dismounts
as a unit; for example, a reel of magnetic tape or a
disk pack.
volume serial label (VOLSER) An
alphanumeric label that host software uses to
identify a volume. It attaches to the spine of a
cartridge and is both human- and machine-
readable.
Z
Z column assembly The column that allows the
hand mechanism in the LSM to move vertically.