Asus TS300-PA4 - Manual (Page 141)

ASUS TS300-E3/PA4 & PS4 6-13
6. Select RAID from the Logical Drive menu, then press <Enter>.
7. Select RAID 10 from the menu, then press <Enter>.
You need at least four identical hard disk drives when creating a RAID 10 set.
8. Select Stripe Size from the Logical Drive menu, then press <Enter>.
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.