Seems to be a NVME case related thing. Perhaps my clamping arangement
shorted out a connection.
I have the disks up. However, the nvme disk is reporting as /dev/sdd
now, not /dev/sdb.
This is dumb. mdadm.conf has configured the array as:
ARRAY /dev/md0 level=raid1 num-devices=2 metadata=1.2
So I got the raid1 array running on the RPI4. Today, I tried to add a
sub directory to the array. Apparently something bad happened and one
of the disks disappeared. When this happened there was some kind of
major upset, as the OS stopped functioning, like it no longer knew where
commands
