[blue68f100]

On the FreeBSD OS which Snap OS is based off of, you can have the BIOS set to NO DRIVES. The FreeBSD reads the drive parameters directly from the drives on startup. This way you can work around bios that do not support larger drives.

I have old pc thay the BIOS only supports 40 gig. Turning off the detection in the BIOS it can read and mount a 120gig HD with no problems.

Also on the 4000 with sn >7070042 use C/S . The older models use M/S. Apparently a hardware change.

So maybe changing the jumper on a 4100 to something other than M may have an impact.

Just a thought.

I know for sure that the sup file loads different/additional software for the Meridian vs Guardian snaps.

You ask How do I know that ???
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I have studied the sup files used in upgrading the snaps.