Technical data

Glossary
GL-2
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CCITT
International Telephone and Telegraph Consultative Committee.
The international standards body for telecommunications.
CCS (Command Control Set)
A standard set of SCSI commands used to communicate with SCSI
devices.
CDB (Command Descriptor Block)
A block of communication passed from the SCSI host to the SCSI
target that provides all control information the target needs to carry
out a command.
CPU (Central Processing Unit)
A personal computerÕs main microprocessor chip.
decode
The act of recovering the original information from an encoded
signal.
differential
Refers to the electrical conÞguration of the signals used on the SCSI
bus. A set of two conductors are used to maintain a positive (+) and
a negative (-) polarity. This technique allows SCSI devices to
communicate over longer distances with minimum interference.
disconnect
The function used by a SCSI target to remove itself from the SCSI
bus and release the control of the bus to other users.
DMA (Direct Memory Access)
A fast method of moving data between two processor subsystems
without processor intervention.