Asus Pedestal Server TS100-E4/PI2 - Manual (Page 143)

ASUS TS100-E4/PI2 6-9
4. Select fd0 using the <Tab> key when asked to select the driver disk
source. Press <Tab> to move the cursor to OK, then press <Enter>.
3. Select Yes using the <Tab> key when asked if you have the driver disk.
Press <Enter>