15.1 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 physical drives and your requirements for performance and reliability.

RAID Level

Redundancy

Physical Drive Usage

Read Performance

Write Performance

Built-in Hot Spare

Minimu Physical Drives

RAID 0

No

100%

***

***

No

2

RAID 1

Yes

50%

**

**

No

2

RAID 10

Yes

50%

**

**

No

4

RAID 5

Yes

67 – 94%

***

*

No

3

RAID 50

Yes

67 – 94%

***

*

No

6

Physical 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.