IBM System Storage TS2900, Setup, Operator, And Service Manual

Page: 239 / 257

© Copyright IBM Corp. 2008
I-1
Glossary
This glossary defines the special terms,
abbreviations, and acronyms that are used in this
publication. If you do not find the term you are
looking for, refer to the index or to the
Dictionary of
Computing , 1994.
Numbers
2:1 compression. The relationship between the quantity
of data that can be stored with compression as compared
to the quantity of data that can be stored without
compression. In 2:1 compression, twice as much data can
be stored with compression as can be stored without
compression.
A
A . Ampere.
ac . Alternating current.
access method . A technique for moving data between
main storage and input or output devices.
accessor
. This component contains the library robot
and bar code reader. The accessor moves cartridges to
and from the I/O Station, storage slots, and tape drives.
adapter card
. A circuit board that adds function to a
computer.
adj . Adjustment.
AH . Authentication Header. This is an Internet
Protocol intended to guarantee connectionless integrity
and data origin authentication of IP datagrams. Further,
it can optionally protect against replay attacks by using
the sliding window technique and discarding old
packets.
AIX
. Advanced Interactive Executive. IBM’s
implementation of the UNIX
®
operating system. The
RS/6000 system, among others, uses AIX as it’s
operating system.
alphanumeric . Pertaining to a character set that
contains letters, numerals, and usually other characters,
such as punctuation marks.
alter . To change.
ambient temperature . The temperature of air or other
media in a designated area, particularly the area
surrounding equipment.
AME . Application Managed Encryption.
ampere (A) . A unit of measure for electric current that
is equivalent to a flow of one coulomb per second, or to
the current produced by one volt applied across a
resistance of one ohm.
ANSI . American National Standards Institute.
application-managed encryption
. Tape encryption
controlled by an application.
archive . To collect and store files in a designated place.
ASCII . American National Standard Code for
Information Interchange. A 7 bit coded character set (8
bits including parity check) that consists of control
characters and graphic characters.
assigning a device
. The establishing of the relationship
of a device to a running task, process, job, or program.
assignment . The naming of a specific device to
perform a function.
asynchronous . Pertaining to two or more processes
that do not depend upon the occurrence of specific
events such as common timing signals.
attention (notice) . A word for calling attention to the
possibility of danger to a program, device, or system, or
to data. Contrast with
caution and danger .
ATTN . Attention.
B
backup
. To make additional copies of documents or
software for safekeeping.
bar code . A code representing characters by sets of
parallel bars of varying thickness and separation which
are read optically by transverse scanning.
bar code label . Paper bearing a bar code and having an
adhesive backing. The bar code label must be affixed to a
tape cartridge to enable the library to identify the
cartridge and its volume serial number.
bar code reader
. A laser device specialized for
scanning and reading bar codes and converting them
into either the ASCII or EBCDIC digital character code.
bezel
. Decorative and safety cover.
bicolored
. Having two colors.