Lukas Ruf <lpruf@stud.ee.ethz.ch> writes:
> on my SCSI-Harddisk (previously run DOS on it) produces at every boot up
> the error message:
> old-*BSD disklabel -- see installboot(8) 
> or similar. 
> 
> When submitting 
> disklabel -c
> I really see two entries named 4.2BSD in the partition table.

It is talking about the MBR, not the BSD disklabel. See installboot(8) 
and fdisk(8) for details.

Perry