Technical information

9871 Tenth Edition Glossary-3
Glossary
drive. A device for moving magnetic tape
and controlling its movement. (IBM)
E
electronics module Unit attached to the
9360 library storage module. The 9315 EM
contains one LCU and one LMU. The 9312
EM contains only the LCU.
EM See electronics module.
emergency power off (EPO) Pressing the
EPO switch on the LSM operator panel or the
EPO button on the access door inside the
LSM immediately removes all power from the
LSM and the LCU.
end-of-tape (EOT) The location on a tape
where written data ends.
EPO See emergency power off.
F
fault symptom code (FSC). A hexadecimal
code generated by the drive for controller
microcode in response to a detected
subsystem error.
file-protect. To prevent the destruction or
overwriting of data stored on cartridge tape.
See also write-protect switch.
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. (T)
FSC. See Fault Symptom Code.
H
hardware. All or part of the physical
components of an information processing
system, such as computers or peripheral
devices. (T) (A)
host. The primary computer on a network,
with which other computers interact.
host interface. Interface between a
network and host computer. (T)
Host Software Component (HSC) That
portion of the automated cartridge system for
a library system that executes on host
systems attached to an automated library.
This component acts as the interface between
the operating system and the rest of the
automated library.
I
ID Identifier or identification.
indicator. A device that gives a visual or
other indication of the existence of a defined
state. (T)
Initial Program Load (IPL). The
initialization procedure that causes an
operating system to commence operation.
input/output (I/O). Pertaining to a device,
process, or channel involved in data input,
data output, or both. (IBM)
interface. Hardware, software, or both, that
links systems, programs, or devices. (IBM)
interface card. See input /output.
intervention required A message
indicating that the operator needs to perform
manual action.
I/O. See input /output.
IPL. See Initial Program Load.
L
LAD See lock access door.
LAN See local area network.
LCD Liquid crystal display. The type of
display used on the operator panel.
LCU See library control unit.
LED See light emitting diode.