Compaq HSZ80 manual GL-14Glossary, Rfi

GL–14Glossary
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	Storage 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	Sometimes referred to as an adapter. (1) A device used to interface between
converter	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 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	A bit-significant representation of the SCSI address referring to one of the
number	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.