StorageTek 4410 Hardware Operator's Manual page 164

Glossary
library storage module (LSM) TA housing
that contains cartridge tapes and a robot that
moves the tapes between storage cells and the
attached transports. Synonymous with tape library.
light emitting diode (LED) A light-emitting
electronic device that uses little energy and is used
mainly on status panels to indicate an on or off
condition.
LMU See library management unit.
local area network (LAN) A computer
network located on a user's premises within a
limited geographical area. Communication within a
local area network is not subject to external
regulations; however, communication across the
LAN boundary may be subject to some form of
regulation. (T)
lock access door A door mounted on the
access door for safety reasons. The procedure to
open and close the LAD prevents a person from
being in the library storage module when the robot
is moving.
LSM See library storage module.
LSM number A method used to identify an
LSM. The first LSM listed in this parameter is 0
(hexadecimal), the second LSM listed is 1, and so
forth, until all LSMs are identified (maximum
number of 15 or hexadecimal F).
M
magazine A removable container that holds
cartridges and is placed in the cartridge access port
(CAP).
maintenance facility Hardware that enables
service personnel to run diagnostics, retrieve
status, and communicate with these units through
their respective control panels.
manual mode A relationship between an LSM
and all attached hosts. LSMs operating in manual
mode have been placed offline to all host CPUs
Glossary-4
and require human assistance to perform cartridge
operations.
master LMU The LMU currently controlling the
functional work of the ACS in a dual LMU
configuration.
modem Modulator/demodulator. An electronic
device that converts computer digital data to
analog data for transmission over a
telecommunications line (telephone line). At the
receiving end, the modem performs the inverse
function.
monitor A device that observes, records, and
verifies the operations of a system to indicate any
significant departure from expected operation.
mount To place a cartridge tape in a drive or
transport and make it accessible to the host
system.
N
not ready Not available to perform operator-
requested actions. Some status information might
be available through network interfaces.
O
offline Neither controlled by, nor
communicating with, a computer. Contrast with
online. (IBM)
online Pertaining to the operation of a
functional unit when under the direct control of
the computer. (T)
operating system (OS) Software that controls
the execution of programs and that may provide
services such as resource allocation, scheduling,
input/output control and data management.
operator control panel A panel that enables
users to configure, diagnose, or receive status
information about the library or drive. Synonymous
with operator panel.
Eleventh Edition 9206