Hi guys. I am trying to back up the BIOS of asus a8n 32-sli deluxe w/ath.fx60 cpu. My created floppy along with added afudos.exe file reads my current BIOS up to @84% then goes into error with"cannot write to disk" The floppy is NOT write protected. What did I do?Is the floppy empty and formatted? Is it a high density floppy (denoted by the HD SYMBOL on one corner and by having two square holes - one for write-protect, one to indicate the higher 1.44MB capacity)? Do you have another floppy you can try?check also your floppy driveHi. The floppy I am trying to use are double sided, double density. I formatted and created boot disk and copied afudos file from MB support disk as per asus user manual. When its LOADED into drive, it gives the prompt "A:\>". I then type in command "afudos /oOLDBIOS1.rom" and .Machine then proceeds to read BIOS (up to 74%) and then REPORTS error : cannot write to disk.Double sided disks only hold 720K. High density hold 1.44 meg.(In other words, you probably need a double-side high density disk - it appears that you are running out of space on the disk. The higher capacity disk will be fine. SEE my message above re how to identify such a disk.)disk is 1.44MB/2HD. I wonder if I simply format another disk and put it in while the machine is reading would it copy to it? Well, the ANSWER is a resounding YES!!! What I ended up doing was to boot the machine with the ms/dos disk which I created and at the A:\ > prompt , I typed in the command and put a quick formatted disk to which was added the unzipped file (afudos.exe) which I got from the ASUS cite. The machine read and copied the BIOS to that second disk. Problem solved. Thanks again guys!