SIIG Serial ATA PCI RAID Bedienungsanleitung PDF herunterladen (Seite 13)

User's Manual

2-2

2-1.2 RAID 1 (mirroring)

Mirroring provides fault tolerance by making an exact

duplicate of existing disks. The mirrored disk can then take

over if the source disk fails. While the mirror approach

provides excellent fault tolerance it is expensive to

implement because only 50% of your disk space is available

for disk storage. Two disks are required for RAID 1.

2-1.3 RAID 0+1 (mirror-striping)

RAID 0+1 combines mirroring with striping. This RAID

array provides fault tolerance and increases disk I/O

performance. Four disks are required for RAID 0+1. Like

RAID 1 only 50% the total disk space is utilized for disk

storage, as the other half is used to create the mirror.

2-2 BIOS Overview

Creating and dissolving RAID sets is currently a function found in

the BIOS. During bootup, the following message will appear,

pausing for a few moments to allow the user to choose what to do:

Press F3 to enter RAID utility

In order to properly prepare and maintain a storage system, the

user needs to be aware of which drive was installed as the Primary

Master, Primary Slave, Secondary Master and Secondary Slave.

Identifying these drives will not only be useful because they are

reported in order in the BIOS as well in the CMD Medley GUI, but

when optimizing RAID sets, it is best to use drives from different

channels. It is also helpful to know which drive is which if the disk

drives are not all of equal size.

Disk Drive and Set Reporting (Numbering)

Before creating or dissolving Raid Sets, it is also important to

understand how each different piece of software reports both the

physical disk drives and “Sets,” which could be either an

independent drive or an actual RAID set consisting of two to four

drives.

For example, the BIOS and CMD Medley GUI will report the four

physical disk drives as 0-3 while reporting each Set as 1-4.

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 53 54

Keine Kommentare

SIIG Serial ATA PCI RAID Bedienungsanleitung Seite 13