5190/5194 Modular Tape Subsystem Manual

5190/5194 Modular Tape Subsystem Manual—426878-002
Glossary-1
Glossary
6760 ServerNet device adapter (ServerNet/DA). See ServerNet device adapter
(ServerNet/DA).
6761 F-PIC. See fiber-optic plug-in card (F-PIC).
6762 S-PIC. See SCSI plug-in card (S-PIC).
ACL. See automatic cartridge loader (ACL).
ADAPTER object type. The Subsystem Control Facility (SCF) object type for all adapters
attached to your system.
autoloader. An elevator mechanism inside the automatic cartridge loader (ACL) that
extracts cartridge tapes from the cartridge magazine and loads them into the tape
drive.
automatic cartridge loader (ACL). A device that stores multiple cartridge tapes and loads
them automatically, one at a time, into a tape drive.
back-end board (BEB). A circuit board that translates fiber-optic signals from a 3216
controller or 6760 ServerNet device adapter into small computer system interface
(SCSI) commands and information for a tape drive. The BEB is housed in a cage-like
sheet-metal enclosure and plugs into one of the 50-pin SCSI ports on the back of a
tape drive customer-replaceable unit (CRU).
backplane interconnect card (BIC). A small circuit board that plugs into the backplane
and connects the system to external devices or cabinets. BICs are installed in the BIC
section in the rear of Compaq NonStop Himalaya K-series system and I/O cabinets.
BACKUP. A utility for the Compaq NonStop Himalaya range of servers that creates a
backup copy of one or more disk files on magnetic tape. See also RESTORE
.
BEB. See back-end board (BEB).
beginning-of-tape (BOT) mark. A data byte sequence that indicates the beginning of the
space available for data recording on a cartridge tape. This sequence appears within
1.34 meters (53 inches) from the leader block.
BIC. See backplane interconnect card (BIC).
BOT. See beginning-of-tape (BOT) mark.
bpi. Bits/inch. A unit of measure used to measure tape drive recording density when
considering one track of a magnetic tape. The abbreviation bpi can stand for
bytes/inch if one inch of the full width of the tape is considered. (Bits are recorded in
parallel.)