[systemd-devel] systemd[1]: Stopped (with error) /dev/mapper/wxyz.

[Andrei Borzenkov]

25.07.2016 06:11, Dave T пишет:
> I have a fileserver with several HDDs (btrfs and dm-crypt for all except
> one which is lvm2 and dm-crypt).
> 
> Within the last week when I umount a USB drive, all my other mounts
> immediately get unmounted too. I lose /home and almost everything else
> except the system device. The USB drive is the ESP (EFI system partition)
> mounted at /boot. It is intended to be unmounted after boot and it worked
> appropriately until the last week.
> 
> If I reboot, all is fine until I umount the USB device (ESP).
> 
> I have *not* tried to reproduce the behavior by umounting other devices as
> this is a live fileserver. However, I can trigger this behavior 100% of the
> time if I umount /boot.
> 
> journalctl shows a number of messages similar to this:
> 
>     Jul 24 20:25:41 myserver systemd[1]: Stopped (with error)
> /dev/mapper/wxyz.
>     -- Subject: Unit dev-mapper-wxyz.device has finished shutting down
>     -- Defined-By: systemd
>     -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
>     --
>     -- Unit dev-mapper-wxyz.device has finished shutting down.
> 
> As I said, the system has started, in the last week, unmounting all these
> other devices. Why?
> 
> I am not a developer and I am new to systemd. I am happy to provide
> additional information upon request.
> 

Boot, trigger problem, send output of "journalctl -b". New clean boot is
better to limit size of journal output.