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Glossary
AlphaServer Intelligent Peripheral Platform Hardware Owner's Guide
Glossary-5
RAID
Redundant arrays of independent disks. A technique that organizes disk data to improve
performance and reliability. RAID has three attributes: it is a set of physical disks viewed by
the user as a single logical device; the user's data is distributed across the physical set of
drives in a defined manner; and redundant disk capacity is added so that the user's data can be
recovered even if a drive fails.
redundant
Pertaining to duplicate or extra computing components that protect a computing system from
failure.
reliability
The probability that a device or system will not fail to perform its intended functions during a specified
time.
repeater
A level 1 hardware device that restores signal amplitude, waveform, and timing of signals
before transmission to another network segment.
SBB
StorageWorks building block. The basic building block of the StorageWorks product line.
Any device conforming to shelf mechanical and electrical standards installed in either a 3½-
inch or 5¼-inch carrier is considered to be an SBB, whether it be a storage device, a power
supply, or other device.
SCSI
Small Computer Systems Interface. An ANSI-standard interface for connecting disks and
other peripheral devices to computer systems. Some devices are supported under the SCSI-1
specification; others are supported under the SCSI-2 specification.
server
A network node or specialized device that provides and manages access to shared network
resources, such as hard disks, printers, and software.
SIMM
Single in-line memory module. A plug-in module that has RAM chips on one side, and an
edge connector that matches a socket on the system module.
Simple Network Management Protocol (SNMP)
A high-level, standards-based protocol for network management, usually used in TCP/IP
(Transmission Control Protocol/Internet Protocol) networks.
SNMP agent
An entity in a hardware device that executes SNMP requests.
SRM
The user interface to console firmware for operating systems that expect firmware
compliance with the Alpha System Reference Manual (SRM).