On Thu, Mar 31, 2022 at 10:06 AM Wols Lists <antlists@xxxxxxxxxxxxxxx> wrote: > > On 31/03/2022 17:44, Bruce Korb wrote: > > 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. > > That's worrying, did it really write a superblock? Yep. That worried me, too. I did the command to show the RAID status of the two partitions and, sure enough, both partitions were now listed as RAID0. > > 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. :) > > > > https://raid.wiki.kernel.org/index.php/Asking_for_help Sorry about that. I have two systems: the one I'm typing on and the one I am trying to bring up. At the moment, I'm in single user mode building out a new /home file system. mdadm --create is 15% done after an hour :(. It'll be mid/late afternoon before /home is rebuilt, mounted and I'll be able to run display commands on the "old" RAID1 (or 0) partitions. > Especially lsdrv. That tells us a LOT about your system. Expect email in about 6 hours or so. :) But openSUSE doesn't know about any "lsdrv" command. "cat /proc/mdstat" shows /dev/md1 (the RAID device I'm fretting over) to be active, raid-0 using /dev/sdc1 and sde1. > What was the filesystem on your raid? Hopefully it's as simple as moving > the "start of partition", breaking the raid completely, and you can just > mount the filesystem. I *think* it was EXT4, but. it might be the XFS one. I think I let it default and openSUSE appears to prefer the XFS file system for RAID devices. Definitely one of those two. I built it close to a decade ago, so I'll be moving the data to the new /home array. > What really worries me is how and why it both recognised it as a raid, > then thought it needed to be converted to raid-0. That just sounds wrong > on so many levels. Did you let it mess with your superblocks? I hope you > said "don't touch those drives"? In retrospect, I ought to have left the drives unplugged until the install was done. The installer saw that they were RAID so it RAID-ed them. Only it seems to have decided on type 0 over type 1. I wasn't attentive because I've upgraded Linux so many times and it was "just done correctly" without having to give it a lot of thought. "If only" I'd thought to back up email and ssh. (1.5TB of photos are likely okay.) Thank you so much for your reply and potentially help :) Regards, Bruce
