Rod, I tried putting the old motherboard back in (before David's
suggestion!) and there was no change, there was no files visible.
However, I was not able to run fdisk, to check the partition
info was the same.  OS/2 2.1 boot diskettes had a failure,
"fdisk error", so had I wanted to, I couldn't have installed
OS/2 2.1!!!  OS/2 warp wanted a CDROM in before going any further,
which would have meant more changes, so I just went to the 
prompt instead.  Couldn't find fdisk anywhere in sight though,
so just left it at that and went back to my new motherboard.
BFN.  Paul.
@EOT:

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