IBM TS4500, Introduction And Planning Manual

Page: 188 / 218

addressable cartridge storage slots
See accessible cartridge storage slots .
Advanced Interactive eXecutive (AIX)
A UNIX operating system that was
developed by IBM that is designed and
optimized to run on POWER
®
microprocessor-based hardware such as
servers, workstations, and blades.
Advanced Library Management System (ALMS)
The next generation of IBM's patented
Multi-Path Architecture. ALMS enables
logical libraries to consist of unique
drives and ranges of VOLSERs, instead of
fixed locations. It offers the ability to
assign tape drives to any logical library
by using the TS4500 management GUI.
Logical libraries can also be added,
deleted, or easily changed without
disruption.
aggregate sustained data transfer rate
For all of the drives in the TS3500 or
TS4500, the sum of their average
throughput of uninterrupted data.
AIX See Advanced Interactive eXecutive .
ALMS See Advanced Library Management System .
AL_PA
See Arbitrated Loop Physical Address .
alphanumeric
Pertaining to a character set that contains
letters, numerals, and other characters,
such as punctuation marks.
alternating current (ac)
An electric current that reverses its
direction at regularly recurring intervals.
amp Ampere.
ampere (A, amp)
A unit of measure for electric current that
is equivalent to a flow of 1 coulomb per
second, or to the current produced by 1
volt applied across a resistance of 1 ohm.
Arbitrated Loop Physical Address (AL_PA)
An 8-bit value that is used to identify a
device in an arbitrated loop. Device ports
communicate by using AL_PAs.
audit The process of moving cartridges in an
HD slot to scan each barcode label.
authorized assembler program (AAP)
A training program for selected IBM
Business Partners that enables them to
purchase incomplete machines and parts,
and provides them with the knowledge to
assemble the components into a final
configured product for sale to their
customers.
automatic cleaning
A method by which the library
automatically responds to any tape drive's
request for cleaning by beginning the
cleaning process.
automatic inventory
A survey of the location of cartridges in
the library. The inventory is performed
when the library is powered on, or
whenever the front door of any frame is
opened and closed during operation.
B
backhitch
When the speed of the host server is
slower than the speed of the drive, the
action of stopping the tape, rewinding
some distance, and restarting.
backup
The short-term retention of records that
are used for restoring essential business
and system files when vital data is lost
because of program or system errors or
malfunctions.
Backup recovery and media services (BRMS)
A software program that runs on OS/400
and allows a business to plan, control,
and automate the backup, recovery, and
media management services for its
AS/400 systems.
bar code
A code that represents characters by sets
of parallel bars of varying thickness and
separation. The bars are read optically by
transverse scanning.
bar code label
A slip of paper that bears 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
On the dual-gripper transport mechanism
of the library, a laser device that is
specialized for scanning and reading bar
codes and converting them into either the
ASCII or EBCDIC digital character code.
170
IBM TS4500: Introduction and Planning Guide