LSI 2108/2208 SAS MegaRAID Configuration Utility User's Manual
1-2 RAID Levels Supported by the 2108/2208 Controller
The LSI Embedded MegaRAID Software Configuration Utility adds RAID functions to enhance system efficiency and data security by supporting RAID 0, RAID 1, RAID 10, RAID 5, RAID 6, RAID 50 and RAID 60. .
Note: A maximum of 16 physical disk drives is supported for RAID.
RAID 0
RAID 0 (Integrated Striping) can greatly enhance hard disk I/O performance by strip- ing data across all disk drives in an array or drive group. This RAID configuration does not provide data redundancy, but it offers the best RAID performance and a high bandwidth. The following illustration provides a visual example of a RAID 0 drive group.
Drive A
Segment 1
Segment 3
Segment 5
Segment 7
Drive B
Segment 2
Segment 4
Segment 6
Segment 8
RAID 0 Example
RAID 1
RAID 1 (Integrated Mirroring) allows data to be simultaneously written to multiple drives. This RAID configuration increases data integrity by providing redundancy, but requires twice the amount of data storage capacity. RAID 1 requires 2 drives. The following illustration provides a visual example of a RAID 1 drive group.
RAID 1 | RAID 1 |
Drive A | Drive B |
Segment 1 | Segment 1 |
| Duplicate |
Segment 3 | Segment 3 |
| Duplicate |
Drive C | Drive D |
Segment 2 | Segment 2 |
| Duplicate |
Segment 4 | Segment 4 |
| Duplicate |
