Asus Pedestal/5U Rackmount Server TS500-E4 Server - Manual (Page 142)

6-6 Chapter 6: RAID configuration
4. Select all the drives required for the RAID set, then press <Enter>.
The configurable array appears on screen.
3. The ARRAY SELECTION MENU displays the available drives connected
to the SATA ports. Select the drives you want to include in the RAID
set, then press <SpaceBar>. When selected, the drive indicator changes
from READY to ONLIN A[X]-[Y], where X is the array number, and Y is
the drive number.
The information of the selected hard disk drive displays at the bottom of
the screen.