Asus KFN5-Q/SAS - Manual (Page 123)

5-16 Chapter 5: RAID configuration
2. When the array details appear, select the hard disk drive you want to
clear, then press . A confirmation message appears.
3. Press to clear the disk data, or press
to cancel. Press to clear disk. The
following confirmation message appears.
5.2.7 Clearing the disk data
You will lose all data when you clear a disk!
To clear the disk data:
1. From the Array List, use the up or down arrow keys to select a RAID
set, then press . The RAID set details appear.
Clear disk data?
[Y] Yes [N] Cancel
For RAID0, clearing one member disk would erase all data in the array.