On Thu, Nov 02, 2023 at 09:48:50AM -0600, Steve Williams (Contractor) wrote:
> In days of old, the "ERR M" could be resolved by booting a DOS floppy and
> doing a "FDISK /MBR".
>
> So I'd say you are missing the master boot record (at a minimum).
The ERR M message comes from biosboot, which is usually installed as the PBR.
That code would not be running if the MBR was invalid, unless biosboot had
somehow been manually installed in the MBR block.
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