StorageTek 4410 Hardware Operator's Manual page 163

F
file-protect To prevent the destruction or
overwriting of data stored on a cartridge tape. See
also write-protect.
firmware An ordered set of instructions and
data stored in a way that is functionally
independent of main storage; for example,
microprograms stored in a ROM.
H
hand assembly A part of the library robot
whose function is to grasp cartridges and move
them between storage cells and drives. A camera
on the hand assembly reads cartridge volume
labels.
home location The cell in a library storage
module (LSM) in which a cartridge is stored. A
cartridge returns to this location when it
dismounts from a drive or cartridge tape unit.
host The primary computer on a network, with
which other computers interacts.
I
ID Identifier or identification.
initial program load (IPL) A process that
activates a machine reset and loads system
programs to prepare a computer system for
operation. Processors having diagnostic programs
activate these programs at IPL execution. Devices
running microcode software usually reload the
functional microcode software from a diskette or
disk drive at IPL execution.
input/output (I/O) The process of moving
data between a host and an external device. I/O is
a collective term for commands, reading, and
writing.
insert The action of placing a cartridge into the
cartridge access port magazine.
9206
interlock switch A switch that disconnects
power to the library when the front door is
opened.
intervention required Operator action is
required (such as removing a cartridge from a
drive).
in-transit cartridge A cartridge left in the
robot hand. The Data Management Software must
recover this cartridge to a known location to clear
out the software in-transit record.
in-transit record A temporary record written
by the host software, noting that a cartridge has
been moved from its home cell. After this
cartridge return to its home cell, the record erases.
IPL See initial program load.
L
LAD See lock access door.
LAN See local area network.
latches The sliding bolts, turned by a key, that
secure a library door.
LCU See library control unit.
leader block The mechanism that loads the
tape through the tape path of a drive.
LED See light emitting diode.
library An installation of one or more ACSs,
attached cartridge drives, volumes placed into the
ACSs, host software that controls and manages the
ACSs and associated volumes, and the library
control data set that describes the state of the
ACSs.
library control unit (LCU) The portion of
the LSM that controls the choosing, mounting,
dismounting, and replacing of cartridges.
library management unit (LMU) The
portion of the ACS that controls the library
storage module and communicates with the host.
Eleventh Edition
Glossary
Glossary-3