Acer PCI to Ultra SCSI RAID Controllers DAC960PG Bedienungsanleitung PDF herunterladen (Seite 70)

G-12 DAC960PG and DAC960PJ Installation Guide

Mirroring

Refers to the complete duplication of data on one disk drive to another disk

drive, this duplication occurs simultaneously with each write operation: each

disk will be the mirror image of the other (also known as RAID Level 1, see

RAID levels). All Mylex RAID controllers support mirroring.

M.O.R.E.

Mylex Online RAID Expansion, an advanced configuration mode that

allows expansion of any unconfigured or hot spare drive into the expandable

drive group while the controller is online with the host. For example, a

system using a five-disk-drive RAID set can add another disk drive to create

a six-disk-drive RAID set. The M.O.R.E. operation can be performed on all

RAID levels except JBOD.

Mylex’s Global Array Manager (GAM) supports two M.O.R.E. features:

Expand Capacity allows logical drive expansion for FFx external controllers

only.

Expand Array allows array expansion for both PCI and FFx external

controllers.

During the RAID set expansion process, which includes re-striping data

from the old (smaller) RAID set to the new (expanded) RAID set, the

controller continues to service host I/O requests.

MTBF

Mean Time Between Failures, the average time from start of use to failure in

a large population of identical systems, computers, or devices.

Narrow SCSI

8-bit wide standard SCSI. Compare with Fast SCSI, Fast/Wide SCSI, Ultra

SCSI, Ultra Wide SCSI, Ultra Fast SCSI, Ultra 160 SCSI, and WideSCSI.

NVRAM

Non-Volatile Random Access Memory, a memory unit equipped with a

battery so that the data stays intact even after the main power had been

switched off.

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Acer PCI to Ultra SCSI RAID Controllers DAC960PG Bedienungsanleitung Seite 70