Following-up my previous comment: While dracut-core initially seemed to fix the corruption problem, I did eventually get some small corruption again (which BTRFS immediately detected), and it turns out that at some point I had started getting some (smaller) shutdown errors again (I don't know why):
systemd-shutdown[1]: Could not detach DM /dm/dm-3: Device or resource busy systemd-shutdown[1]: Could not detach DM /dm/dm-0: Device or resource busy systemd-shutdown[1]: Failed to finalize DM devices, ignoring. As I'd since bought & switched to a new NVMe drive, which is large enough to completely contain my cached / and /home partitions, I disabled lvmcache, and switched to LVM -type raid1 --mirrors 1 instead (with --raidwritemostly used to avoid reading from my slow spinning disk of rust). This appears to have completely solved my shutdown errors, but I have not yet tried disabling dracut-core to see if that's still needed. (I suspect that performance is also better, since everything is cached immediately, rather than having to be read one or more times first.) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1905166 Title: systemd-shutdown cannot detach DM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/finalrd/+bug/1905166/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
