Original server was hardware installed from thumb drive iso. Set up LFS on server install.
New server from VirtualBox vm. Used ext4 there. Have it running on different drive on original server. LFS drive is set aside.
Want to get at some info from LFS drive. Trying to mount external LFS drive is running into many dead ends so far.
And of course it was simply a question of installing the correct file system drivers. In this case # apt update & apt install lvm2, and the volume can be mounted read/write.
I will keep the old drive around for a while in the external housing. I’m sure there will be times I want to find stuff to pluck off. But I need to put a label on it for a hard date to be DBANed.