{{parent page="Storage"}}

[[SoftwareRAID Software Raid]]

===RAID level===
RAID stands for Redundant Array of Independent Drives. It comes in different levels:

==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.

==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.

==RAID0+1==
1 set of mirror consists of 2 sets of stripe. Allow 1 disk failure, 50% storage capacity.

==RAID1+0 (or RAID10)==
1 set of stripe consists of 2 sets of mirror. Allow 2 disk failure, 50% storage capacity.

==RAID5+0==
1 set of stripe consists of 2 sets of RAID5. 

==RAID5+1==
1 set of mirror consists of 2 sets of RAID5