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

Table Of Contents
Glossary
–19HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and
Configuration Guide
Glossary–19
RFI
Radio frequency interference. The disturbance of a signal by an
unwanted radio signal or frequency.
replacement
policy
The policy specified by a switch with the SET FAILEDSET command
indicating whether a failed disk from a mirrorset or RAIDset is to be
automatically replaced with a disk from the spareset. The two switch
choices are AUTOSPARE and NOAUTOSPARE.
SBB
StorageWorks building block. (1) A modular carrier plus the interface
required to mount the carrier into a standard StorageWorks shelf. (2)
any device conforming to shelf mechanical and electrical standards
installed in a 3.5-inch or 5.25-inch carrier, whether it is a storage
device or power supply.
SCSI
Small computer system interface. (1) An ANSI interface standard
defining the physical and electrical parameters of a parallel I/O bus
used to connect initiators to devices. (2) a processor-independent
standard protocol for system-level interfacing between a computer and
intelligent devices including hard drives, floppy disks, CD-ROMs,
printers, scanners, and others.
SCSI-A cable
A 50-conductor (25 twisted-pair) cable generally used for
single-ended, SCSI-bus connections.
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 DOC (DWZZA-On-a-chip) and 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.