Compaq StorageWorks HSG60 ACS Solution Software V8.6 for Compaq Tru64 UNIX Installation and Configuration Guide

Glossary–17
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
Concat commands implement storageset expansion features.
storage subsystem The controllers, storage devices, shelves, cables, and power supplies used to
form a mass storage subsystem.
storage unit The general term that refers to storagesets, single-disk units, and all other
storage devices that are installed in your subsystem and accessed by the host.
A storage unit can be any entity that is capable of storing data, whether it is a
physical device or a group of physical devices.
StorageWorks A family of Compaq modular data storage products that allow customers to
design and configure their own storage subsystems. Components include
power, packaging, cabling, devices, controllers, and software. Customers can
integrate devices and array controllers in StorageWorks enclosures to form
storage subsystems.
StorageWorks systems include integrated SBBs and array controllers to form
storage subsystems. System-level enclosures to house the shelves and standard
mounting devices for SBBs are also included.