I moved the two disks from a cleanly shut down system that could not reboot and could not be upgraded to a new OS release. So, I put them in.a new box and did an install. The installation recognized them as a RAID and decided that the partitions needed a new superblock of type RAID-0. Since these data have never been remounted since the shutdown on the original machine, I am hoping I can change the RAID type and mount it so as to recover my. .ssh and .thunderbird (email) directories. The bulk of the data are backed up (assuming no issues with the full backup of my critical data), but rebuilding and redistributing the .ssh directory would be a particular nuisance. SO: what are my options? I can't find any advice on how to tell mdadm that the RAID-0 partitions really are RAID-1 partitions. Last gasp might be to "mdadm --create" the RAID-1 again, but there's a lot of advice out there saying that it really is the last gasp before giving up. :) Thank you! - Bruce