Technical data

GL–16 Glossary
SCSI bus signal
converter
Sometimes referred to as an adapter. (1) A device used to interface between
the subsystem and a peripheral device unable to be mounted directly into
the SBB shelf of the subsystem. (2) a device used to connect a differential
SCSI bus to a single-ended SCSI bus. (3) A device used to extend the length
of a differential or single-ended SCSI bus. See also I/O module.
SCSI device (1) A host computer adapter, a peripheral controller, or an intelligent
peripheral that can be attached to the SCSI bus. (2) Any physical unit that
can communicate on a SCSI bus.
SCSI device ID
number
A bit-significant representation of the SCSI address referring to one of the
signal lines, numbered 0 through 7 for an 8-bit bus, or 0 through 15 for a
16-bit bus. See also target ID number.
SCSI ID number The representation of the SCSI address that refers to one of the signal lines
numbered 0 through 15.
SCSI-P cable A 68-conductor (34 twisted-pair) cable generally used for differential bus
connections.
SCSI port (1) Software: The channel controlling communications to and from a
specific SCSI bus in the system. (2) Hardware: The name of the logical
socket at the back of the system unit to which a SCSI device is connected.
serial transmission A method transmission in which each bit of information is sent sequentially
on a single channel rather than simultaneously as in parallel transmission.
service rate The rate at which an entity is able to service requests For example, the rate
at which an Arbitrated Loop is able to service arbitrated requests.
signal converter See SCSI bus signal converter.
SIMM Single Inline Memory Module.
single ended I/O
module
A 16-bit I/O module. See also I/O module.