Asus DSBF-DM/SAS - Manual (Page 131)

ASUS DSBF-DM Seriies 5-21
2. Select Logical Drive from the Objects sub-menu, then press <Enter>.
3. Select the logical drive to initialize from the Logical Drives sub-menu, then
press <Enter>.
4. Select Initialize from the pop-up menu, then press <Enter> to start
initialization.