HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and Configuration Guide

Glossary
Glossary–20 HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and
Configuration Guide
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.
signal converter
See SCSI bus signal converter.
single ended I/O
module
A 16-bit I/O module. See also I/O module.
single-ended
SCSI bus
An electrical connection where one wire carries the signal and another
wire or shield is connected to electrical ground. Each signal logic level
is determined by the voltage of a single wire in relation to ground. This
is in contrast to a differential connection where the second wire carries
an inverted signal.
spareset
A collection of disk drives made ready by the controller to replace
failed members of a storageset.
storage array
An integrated set of storage devices.
storage array
subsystem
See storage subsystem.
storageset
(1) A group of devices configured with RAID techniques to operate as
a single container. (2) Any collection of containers, such as stripesets,
mirrorsets, striped mirrorsets, and RAIDsets.
storageset
expansion
The dynamic expansion of the storage capacity (size) of a unit. A
storage container is created in the form of a concatenation set which is
added to the existing storage set defined as a unit.
storage
subsystem
The controllers, storage devices, shelves, cables, and power supplies
used to form a mass storage subsystem.