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Thread: Unmounting /var partition I get 'device is busy'

  1. #1
    Join Date
    Mar 2011

    Unmounting /var partition I get 'device is busy'

    I'm running my server from a usb key and I moved /var to another key in order to save some space and improve speed (helped a lot).

    The problem I'm having though is that when shutting down / restarting I get:

    umount2: Device or resource busy

    Whilst trying to umount /var (formatted ext2)

    I followed the tutorials on here to move /var although I did it this way:

    Stopped all services / daemons (init 1) then copied the contents to the usb key, edited fstab, moved the original /var (then created the new 'blank' one with run and lock directories). Then rebooted... All works fine

    If I do a 'shutdown now' and go back to the root console, sometimes I can see that rsyslogd and bizarrely mythtv-backend have restarted themselves (I can see that sometimes in the shutdown text output)... Why would they do that?

    Upsettingly, even if I stop them and check /var is not being used (with lsof ) it still fails to umount?

    Any advice?

  2. #2
    Join Date
    Mar 2011

    Re: Unmounting /var partition I get 'device is busy'

    I've been playing a bit more and still can't get a clean shutdown.. Here is my fstab:

    # /etc/fstab: static file system information.
    # Use 'blkid -o value -s UUID' to print the universally unique identifier
    # for a device; this may be used with UUID= as a more robust way to name
    # devices that works even if disks are added and removed. See fstab(5).
    # <file system> <mount point>   <type>  <options>       <dump>  <pass>
    proc            /proc           proc    nodev,noexec,nosuid 0       0
    # Volume_1 
    UUID=b4d00614-57b4-4a74-a89a-f1d06debf75b	/mnt/sda2	ext2	defaults	1	1
    # Volume_2
    UUID=fd993fde-6098-4b7a-bd8d-5db38a690efb	/mnt/sdb2	ext2	defaults	1	2
    # tmpfs to stop USB wear
    tmpfs /tmp tmpfs rw 0 0
    # /var on usb stick to save some space etc
    UUID=08c7d078-5630-4a06-8da1-f5d8f00381b1  /var		ext2	noatime,errors=remount-ro 0 	1
    # / was on /dev/sdd1 during installation
    UUID=1a01ebd5-298a-4472-b9f4-914c11b4d7cf /               ext4    noatime,errors=remount-ro 0       1
    # swap was on /dev/sdd5 during installation
    UUID=ffef48ae-a495-40c7-b858-1107a2d48599 none            swap    sw              0       0

  3. #3
    Join Date
    Mar 2011

    Re: Unmounting /var partition I get 'device is busy'


    Mods - is this in the best forum for this question?


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