B.11
Comparing RAID Levels
Use this table to select the RAID levels that are most appropriate for the logical drives on your storage
space, based on the number of available disk drives and your requirements for performance and reliability.
Minimum
Disk Drives
Built-in Hot
Spare
Write Perfor-
mance
Read Perfor-
mance
Disk Drive
Usage
Redundancy
RAID Level
2
No
***
***
100%
No
RAID 0
2
No
**
**
50%
Yes
RAID 1
3
No
**
**
33%
Yes
RAID 1(ADM)
3
No
**
**
50%
Yes
RAID 1E
4
No
**
**
50%
Yes
RAID 10
6
No
**
**
33%
Yes
RAID 10(ADM)
3
No
*
***
67 – 94%
Yes
RAID 5
4
Yes
*
***
50 – 88%
Yes
RAID 5EE
6
No
*
***
67 – 94%
Yes
RAID 50
4
No
*
**
50 – 88%
Yes
RAID 6
8
No
*
**
50 – 88%
Yes
RAID 60
Disk drive usage, read performance, and write performance depend on the number of drives in the logical
drive. In general, the more drives, the better the performance.
56
Microsemi Proprietary and Confidential. Installation and User's Guide Revision 5
Understanding RAID
