Quantum SDLT 320 User Manual Page 138

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Glossary SDLT 220 and SDLT 320 Product Manual
G-2 March 2004 81-85002-01
B
Backup A copy of a file, directory, or volume on a separate storage device
from the original, for the purpose of retrieval in case the original
is accidentally erased, damaged, or destroyed.
Bad Data
Block
A block that cannot reliably hold data because of a media flaw or
damaged format markings.
Base Plate An aluminum die casting that acts as the support platform for the
other modules and for the drive enclosure. The base plate
includes the precision mounting holes used to install SDLT
drives into a server or tape library.
Bezel (Also known as the faceplate.) A plastic panel that extends the
face of a drive so that it covers a computers drive bay opening.
The bezel usually contains a drive-activity LED.
BIOS Basic Input/Output System. A set of routines that work closely
with the hardware to support the transfer of information between
various elements of the system, such as memory, disks, and
peripheral devices.
Block A sector or group of sectors. By default, a sector of data consists
of 512 bytes.
BOT Beginning of Tape. The physical beginning of the tape.
BRC Backward-Read Compatibility. The ability of a current drive
product to read tapes written on earlier model drives.
Buckling
Mechanism
The buckling mechanism engages the tape leaders upon cartridge
load and disengages them on cartridge unload.
Buffer An area of RAM reserved for temporary storage of data that is
waiting to be sent to a device. The data is usually on its way to or
from the hard disk drive or some other peripheral device.
Bus The part of a chip, circuit board, or interface designed to send
and receive data.
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