RAID levels explained
Below is a table showing the different RAID levels
|
RAID
|
Capacity
|
Large Data Transfers
|
High I/O Rate
|
Data Availability
|
|
Single Disk
|
Fixed 100%
|
Good
|
Good
|
Single drive MTBF
|
|
RAID 0
|
Excellent 100%
|
Very Good
|
Very Good
|
Poor * MTBF of drive
|
|
RAID 1
|
Moderate 50%
|
Good
|
Good
|
Good
|
|
RAID 3
|
Good - Very Good*
|
Very Good
|
Good
|
Good
|
|
RAID 5
|
Good - Very Good*
|
Good - Very Good*
|
Good
|
Good
|
|
RAID 6
|
Moderate - Good~
|
Very Good~
|
Good
|
Very Good
|
|
RAID 0+1
|
Moderate 50%
|
Good
|
Very Good
|
Good
|
|
RAID 1+0
|
Moderate 50%
|
Very Good
|
Very Good
|
Very Good
|
|
RAID 30
|
Good - Very Good*
|
Very Good
|
Excellent
|
Excellent
|
|
RAID 50
|
Good - Very Good*
|
Good - Very Good*
|
Excellent
|
Excellent
|
* dependant on the number of drives in the RAID (3 to 16).
~ dependant on the number of drives in the RAID (5 to 16).
|
