Greetings, I'm trying to mount a very old disk (maybe before 1996). If I try mount /dev/fd0, mount returns that it cannot determine the filesystem type.
I did a dd if=/dev/fd0 to a file and then od -s file |more. What I get in the beginning is:

0000003 IBM 3.3
0000726 IBMBIO COMIBMDOS COM
0023000 TEXTUS BAT
0023141 1970
0041200 AUTOEXECBAT
0041240 CATALOG CAT
0041300 UNTITLEDCAT
0041340 PROVA CAT
0041500 MORALE
0041540 FILE0001CHK
0041600 FILE0002CHK
0041640 FILE0003CHK
0041740 TEXTUS BAT
0044100 ENUNCIA EXE
0044140 ORTO EXE
0044200 ENUGEN EXE
0044240 ORTOGEN EXE
..etc...

So am I to suppose this is an ibm dos disk? The friend that asked me to check this out has try using the disk in WinXP and I think the disk did not load. Is there a way I could extract the files from the image and write them to a new disk? I don't even know if the disk is damaged. Thanks for any help.

I'm not sure, but if I were you I would:

1) Make sure you have dosfs support in your kernel - otherwise you won't be able to mount it
2) On an image of the disk, maybe running fsck.msdos will make it mountable
3) Maybe the sleuth kit (http://www.sleuthkit.org) can help

Have you tried mounting it as a dos disk? Something like, as root
You could also look at