Mounting very old (NCR SysV) drives

[Peter P.]

If the disk does not have a valid label then the system may not want to have
anything to do with it. Try man disklabel and see what gives. Do not write a new
label to the disk. Also try scsictl if the disk detaches unexpectedly (likely if
attempts are made to mount it with 'default' options lacking data from a valid
disklabel).

See here:

http://www.brno.cas.cz/cgi-bin/bsdi-man?proto=1.1&query=disklabel&msection=5&apropos=0

Afaik there are several filesystems that were used by SysV that you will not be
able to read at all using *BSD. If lost after mounting succeeds:

http://www.unixguide.net/unixguide.shtml

Peter


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