Acer PCI to Ultra SCSI RAID Controllers DAC960PG Bedienungsanleitung PDF herunterladen (Seite 62)

G-4 DAC960PG and DAC960PJ Installation Guide

SCSI bus on a disk array controller. Each disk array controller provides at

least one channel.

Conservative Cache

An operating mode in which system drives configured with the write-back

caching policy are treated as though they were configured for write-through

operation and the cache is flushed.

Consistency Check

A process that verifies the integrity of redundant data. A consistency check

on a RAID 1 or RAID 0+1 configuration (mirroring) checks if the data on

drives and their mirrored pair are exactly the same. For RAID Level 3 or

RAID Level 5, a consistency check calculates the parity from the data

written on the disk and compares it to the written parity. A consistency check

from Mylex utilities such as Global Array Manager

(GAM) or RAID

EzAssist

give the user the ability to have a discrepancy reported and

corrected. See also Parity Check.

Data Transfer Rate

The amount of data per unit of time moved through a channel or I/O Bus in

the course of execution of an I/O load, usually expressed in MBps.

DB-9

A type of connector used for serial interfaces.

Device Driver

A software program that controls a particular type of device attached to a

computer, such as a RAID subsystem, printer, display, CD-ROM, disk drive,

etc.

DIMM

Dual In-line Memory Module, a circuit board that has memory chips. Instead

of installing two SIMMs for the 64-bit memory path on a Pentium processor,

one DIMM can be installed. See also SIMM.

Disk

A non-volatile, randomly addressable, re-writable data storage device,

including rotating magnetic and optical disks as well as solid-state disks or

other electronic storage elements.

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Acer PCI to Ultra SCSI RAID Controllers DAC960PG Bedienungsanleitung Seite 62