IBM TS4500, Введение и руководство по планированию

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The bar code reader reads the bar code on
the labels of cartridges or at the rear of
empty storage slots.
base frame
The primary unit of the TS4500 tape
library. The base frame is distinguished
from an expansion frame by its I/O
stations and display panel. The base
frame includes a rail assembly for the
cartridge accessor and up to 16 tape
drives.
bel Ten decibels.
bit Either of the digits 0 or 1 when used in
the binary numbering system.
bpi Bits per inch.
bridge A storage controller that forms a bridge
between two external I/O buses.
British thermal unit (Btu)
The quantity of heat that is required to
raise the temperature of one pound of
water 1 degree Fahrenheit at a specified
temperature.
browser
A client program that initiates requests to
a web server and displays the information
that the server returns.
BRSM See Backup recovery and media services .
Btu See British thermal unit .
bulk load
To manually insert large quantities of tape
cartridges into a tape library's empty
storage slots.
bus See SCSI bus .
byte A string that consists of a number of bits
(usually 8) that are treated as a unit and
represent a character. A byte is a
fundamental data unit.
C
calibration
Adjustment, tuning.
calibration sensor
On the cartridge accessor of the TS4500
tape library, the component that provides
the means to find certain positions within
the library precisely during the calibration
operation.
Call Home
A feature that allows the TS4500 tape
library to report failures to a support
center.
CAN See Controller Area Network .
CAP See cartridge assignment policy .
capacity
See media capacity .
Capacity expansion feature
Applys only to the base frame of the
TS4500 tape library, the cartridge storage
slots that are on the interior of the front
door and enabled for more storage. The
Capacity Expansion Feature increases the
maximum quantity of storage slots in the
base frame.
Capacity on Demand
A feature that adds capacity to the library
and that is only available through the
field. See also High Density Capacity on
Demand .
cartridge
See tape cartridge .
cartridge accessor
The mechanism in the TS4500 tape library
that moves cartridges between the storage
slots, tape drives, and the I/O stations.
The accessor includes the X-axis motion
assembly, Y-axis motion assembly, pivot
assembly, cartridge gripper, bar code
reader, and calibration sensor.
cartridge assignment policy (CAP)
With the TS3500 tape library, a method
that is used to automatically assign
cartridges to a logical library by using
beginning and ending volume serial
number ranges that are set by the user.
See also VOLSER ranges .
cartridge cache
Non-HD slots (Tier 0) selected as
preferred locations for frequently used
cartridges. The library firmware tracks the
most recent usage of each cartridge as a
means to arbitrate which cartridges
should be maintained in the cartridge
cache.
cartridge gripper
An electromechanical device on the
cartridge accessor of the TS4500 tape
library that gets or puts cartridges from
or to a storage slot, tape drive, or I/O
Glossary
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