>No SCSI devices. Any other ideas?
>
Then I would say that the DOS disks have to be corrupted - probably with some 6.22 files copied onto it (this was a common practice back in the DOS days) when DOS disks were THE tool to have. Sometimes files of one version got onto another. Have you tried a different set of disks? You can look at the dates of the files on the disks. I believe they started dating the files based on version with 6.00.

Other than that, I dunno.