Asus RS162-E4/RX4 - Manual (Page 120)

Chapter 6: RAID configuration -
3. The Create New Array screen shows the disks you can add to make up
the IME volume.
Integrated Mirroring Enhanced (IME) supports three to eight disks, or
seven mirrored disks plus a hot spare disk. Use the arrow key to select
a disk, then move the cursor to the RAID Disk column. To include this
disk in the array, press <+>, <->, or <Space>.
You may also specify the Hot Spare disk here. Select the disk, then
move the cursor to the Hot Spr column, then press <+>, <->, or
<Space>.
2. The Select New Array Type screen apprears. Use the arrow keys to
select Create IM Volume, then press <Enter>.
6.2.2 Integrated Mirroring Enhanced
To create an IME volume:
1. The Adapter Properties screen appears. Use the arrow keys to select
RAID Properties, then press <Enter>.