DEC VAXstation 3100 Owner's Manual page 188

backup process
The process of making copies of the data stored on your disk so that you can recover
that data after an accidental loss.
bad block
A damaged block on a disk that the system cannot access. Blocks become damaged
from wear or abuse.
barrel connector
A female connector for connecting two sections of ThinWire cable.
baud rate
The speed at which signals are serially transmitted along a communications line.
One baud equals one bit per second.
binary
A number system that uses two digits: 0 and 1. They are represented in system
circuitry by two voltage levels, and programs are executed in binary form.
b»
A binary digit; the smallest imit of information in a binary system of notation,
designated as a 0 or a 1.
block
A standard unit of storage space on a disk or tape surface; 512 bytes. Although a
drive writes data to the disk or tape 1 byte at a time, a block is the smallest amount
of space on a disk or tape that the system can access.
BNC connector
See connector.
boot
lb bring a device or system to a d^ned state where it can operate on its own. See
bootstrap.
bootable medium
A hard disk, optical disc, or magnetic tape cartridge containing software (such as an
operating system) that can be loaded into memory and executed.
Glossary-2