Mark Rewis wrote:

> I am running pmax 1.4.1
> 
> I have a DEC RRD40 cdrom
> It is set to scsi id 4 ( confirmed at start-up and via dmesg ).

Is this something like an Ultrix cdrom?  Most DEC cdrom's (for the
Ultrix based systems) are in ffs/ufs format, not ISO format.  Something
like a plain:

	mount -r /dev/rz4c /CDROM

might work, but it _might_ also panic the kernel or have other bad side
effects if the kernel thinks the filesystem is mostly ok but get's
tripped up by some incompatibilities between the old ffs format and the
current one.  ISTR that someone mentioned recently that they couldn't
mount an Ultrix filesystem.

Unless anyone has tried this recently and can offer better advice, to be
safe I'd boot to single user mode and try mounting the CD while the root
filesystem is read-only and see if you can read files, etc.

Simon.