Revision [2350]
Last edited on 2009-07-02 07:37:41 by WikiAdminAdditions:
[[SoftwareRAID Software Raid]]
Revision [887]
Edited on 2007-08-14 01:36:42 by WikiAdminAdditions:
RAID stands for Redundant Array of Independent Drives. It comes in different levels:
Deletions:
Revision [886]
Edited on 2007-08-14 01:35:53 by WikiAdminAdditions:
==RAID5==
Data chopped into 2 pieces, and a calculated checksum forming the 3rd piece. 3 pieces of data are then spread across multiple disks. n-1 storage capacity, minimum 3 disks.
Data chopped into 2 pieces, and a calculated checksum forming the 3rd piece. 3 pieces of data are then spread across multiple disks. n-1 storage capacity, minimum 3 disks.
Revision [885]
Edited on 2007-08-14 01:33:46 by WikiAdminAdditions:
===RAID level===
Quick summary
==RAID0==
Data spread across two disks. Zero fault intolerance. 100% storage capacity.
==RAID1==
Data mirrored across two disks. Allow 1 disk failure. 50% storage capacity.
1 set of mirror consists of 2 sets of stripe. Allow 1 disk failure, 50% storage capacity.
1 set of stripe consists of 2 sets of mirror. Allow 2 disk failure, 50% storage capacity.
1 set of stripe consists of 2 sets of RAID5.
Quick summary
==RAID0==
Data spread across two disks. Zero fault intolerance. 100% storage capacity.
==RAID1==
Data mirrored across two disks. Allow 1 disk failure. 50% storage capacity.
1 set of mirror consists of 2 sets of stripe. Allow 1 disk failure, 50% storage capacity.
1 set of stripe consists of 2 sets of mirror. Allow 2 disk failure, 50% storage capacity.
1 set of stripe consists of 2 sets of RAID5.
Deletions:
Most of the RAID levels are well known. The following is worth noting:
1 set of mirror consists of 2 sets of stripe
1 set of stripe consists of 2 sets of mirror
1 set of stripe consists of 2 sets of RAID5
