Asus Motherboard DSBF-DE/SAS - Manual (Page 185)

ASUS DSBF-DE Series -11
4. When prompted, insert the RAID driver disk to the floppy disk drive, then
press <Enter>.
5. When prompted, select the floppy disk drive (fd0) as the driver update
medium, select OK, then press <Enter>.
The drivers for the RAID controller are installed to the system.