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

Glossary–16 HSG60 ACS Solution Software Version 8.6 for Compaq Tru64 UNIX Installation and Configuration
Guide
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 DWZZA, DWZZB, DWZZC,
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.
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.