Specifications

GL–19

Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide

request rate The rate at which requests are arriving at a servicing entity.

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.