Asus P5LD-MR - Manual (Page 116)

5-18 Chapter 5: Driver installation
6. Select RAID from the Logical Drive menu, then press <Enter>.
7. Select the RAID level from the menu, then press <Enter>.
You need at least two identical hard disk drives when creating a RAID 1 set.
8. When creating a RAID 1 or a RAID 10 set, select Stripe Size from the
Logical Drive menu, then press <Enter>.
When creating a RAID 0 set, proceed to step 10.
9. Key in the stripe size, then press <Enter>.
For server systems, we recommend that you use a lower array block size.
For multimedia computer systems used mainly for audio and video editing,
we recommend a higher array block size for optimum performance.