Asus DSBV-DX/C - Manual (Page 132)

5-18 Chapter 5: RAID configuration
3. When prompted, press the to select Yes from the Initialize?
dialog box, then press . You may also press to initialize the
drive without confirmation.
Initializing a logical drive(s) erases all data on the drive.
4. A progress bar appears on screen. If desired, press to abort
initialization.