host

The computer system in which a RAID controller is installed. It uses the

 

RAID controller to transfer information to and from devices attached to

 

the SCSI bus.

host adapter

A circuit board or integrated circuit that provides a device connection to

board

the computer system.

hot spare

An idle, powered on, standby drive that is ready for immediate use in

 

case of drive failure. A hot spare does not contain any user data. A hot

 

spare can be dedicated to a single redundant array or it can be part of

 

the global hot-spare pool for all arrays managed by the controller.

 

When a drive fails, the controller firmware automatically replaces and

 

rebuilds the data from the failed drive to the hot spare. Data can be

 

rebuilt only from virtual drives with redundancy (RAID levels 1, 5, 6, 10,

 

50, and 60; not RAID level 0), and the hot spare must have sufficient

 

capacity.

internal SAS

A SAS device installed inside the computer cabinet. These devices are

device

connected by using a shielded cable.

main memory

The part of computer memory that is directly accessible by the CPU

 

(usually synonymous with RAM).

NVRAM

Acronym for nonvolatile random access memory. An EEPROM

 

(electronically erasable read-only memory) chip that stores configuration

 

information. Refer to EEPROM.

PCI

Acronym for peripheral component interconnect. A high-performance,

 

local bus specification that allows the connection of devices directly to

 

computer memory. The PCI Local Bus allows transparent upgrades from

 

32-bit data path at 33 MHz to 64-bit data path at 33 MHz, and from 32-bit

 

data path at 66 MHz to 64-bit data path at 66 MHz.

PCI Express

Acronym for peripheral component interconnect Express. A high-

 

performance, local bus specification that allows the connection of devices

 

directly to computer memory. PCI Express is a two-way, serial connection

 

that transfers data on two pairs of point-to-point data lines. PCI Express

 

goes beyond the PCI specification in that it is intended as a unifying I/O

 

architecture for various systems: desktops, workstations, mobile, server,

 

communications, and embedded devices.

A-2

Glossary of Terms and Abbreviations

 

Copyright © 2009 by LSI Corporation. All rights reserved.

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LSI 25083 manual Host adapter, Board, Hot spare, Internal SAS, Device, Main memory, PCI Express