Asus Pedestal/5U Rackmount Server TS500-E4 Server - Manual (Page 187)

ASUS TS500-E4 7-11
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.