Technical information

9871 Tenth Edition Glossary-5
Glossary
P
pass-thru port (PTP) A mechanism that
allows one or two cartridges to be passed
from one LSM to another when multiple LSMs
are connected.
PCAP See priority cartridge access port.
port In the Library Server version of the
Nearline software, the connection between
the client operating system and the ACS.
priority cartridge access port (PCAP) An
assembly allowing an operator to enter or
eject one cartridge during automated
operations. The PCAP is on the access door
of an LSM.
PTP See pass-thru port.
R
rewind. To move tape from the take-up hub
to the supply hub. (IBM)
robot (An electromechanical device that
moves cartridges among the cartridge access
ports, the storage cells, and the drives.
S
station In the host software component
version of the Nearline software, the
connection between the client operating
system and the LMU.
storage cells A location where data
cartridges are kept in the library.
T
T9940 A cartridge drive that reads/writes to
tapes; the housing for the tape contains a
single reel.
tape. See magnetic tape.
tape drive. A device for moving magnetic
tape and controlling its movement. (T)
theta The lateral motion of the arm
assembly of a library robot about the center
column as viewed from the top of the arm,
where clockwise motion is considered
positive.
transport An electromechanical device that
threads tape from a cartridge, moves the tape
across a read/write head, and writes data
onto or reads data from the tape.
V
VOLSER See volume serial number.
VOLSER label An external label attached to
the spine of a cartridge. The label contains
the volume serial number and can be read by
people and the camera.
volume A data carrier that is mounted or
dismounted as a unit. (See cartridge).
volume serial number (VOLSER) A
number in a volume label assigned when a
volume is prepared for use in a system. (IBM)
W
write-enabled (A setting on cartridge tapes
that allows data to be written on the tape.
write operation. An output operation that
sends a processed record to an output device
or output file. (IBM)
write protection. Restriction of writing into
a data set, file or storage area of a user or
program not authorized to do so. (IBM)