Dell SCSI 6/IR Manuel d'utilisateur télécharger pdf (Page 11)

Overview 11

Integrated Mirroring

With Integrated Mirroring (RAID 1), data written to one disk is simultaneously written to another disk.

If one disk fails, the contents of the other disk can be used to run the system and rebuild the failed

physical disk. The primary advantage of Integrated Mirroring is that it provides 100 percent data

redundancy. Because the contents of the disk are completely written to a second disk, it does not matter

if one of the disks fails. Both disks contain the same data at all times. Either physical disk can act as the

operational physical disk.

NOTE: Mirrored physical disks improve read performance by read load balance.

Figure 1-3. Example of Integrated Mirroring (RAID 1)

Stripe element 1

Stripe element 2

Stripe element 3

Stripe element 1 Duplicated

Stripe element 2 Duplicated

Stripe element 3 Duplicated

Stripe element 4 Stripe element 4 Duplicated

book.book Page 11 Wednesday, July 25, 2007 10:58 AM

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 61 62

Pas de commentaire

Dell SCSI 6/IR Manuel d'utilisateur Page 11