[linux-lvm] Can't get rid of INACTIVE read/write snapshot
Mikulas Patocka
mpatocka at redhat.com
Tue Jun 3 19:15:40 UTC 2008
> Hi all
>
> I'm using lvm2-2.01.08-2.1 on fc4, kernel 2.6.16-1 with linux-vserver
> patches.
>
> A while ago, I mistakenly created a 39GB read-write snapshot of my
> /vservers partition (which, btw, seemed to work). But after some time
> this partition got to an overflow and since then I can't get rid of it
> anymore. See the lvdisplay output below.
>
> lvchange -an or --refresh gives me a message "Can't change snapshot
> logical volume "vservers_snapshot"".
>
> lvremove lets me wait, then "top" shows 100% IO-Wait but does not come
> to an end (at least after an hour). I don't know how much patience I
> would need, this box is rather fast otherwise (dual xeon 2.8GHz w/ SATA
> drives).
Hi
It looks like an unknown bug in lvremove. Send a strace of lvremove while
it waits for that long amount of time.
Mikulas
> Rebooting does not help anything.
>
> Is there a safe way to simply get rid of this snapshot? Any help would
> much be appreciated.
>
> Regards
> --Marcel
>
> --- Logical volume ---
> LV Name /dev/vg00/lv00_vservers
> VG Name vg00
> LV UUID 9oELP3-2l7d-gTML-2xg2-unTu-znP0-qVd3Mc
> LV Write Access read/write
> LV snapshot status source of
> /dev/vg00/vservers_snapshot [INACTIVE]
> LV Status available
> # open 1
> LV Size 39,06 GB
> Current LE 625
> Segments 1
> Allocation contiguous
> Read ahead sectors 0
> Block device 253:9
>
> --- Logical volume ---
> LV Name /dev/vg00/vservers_snapshot
> VG Name vg00
> LV UUID cQEj3z-V2jD-QOCl-3Yea-ETQZ-Egj9-2B7nd2
> LV Write Access read/write
> LV snapshot status INACTIVE destination for /dev/vg00/lv00_vservers
> LV Status available
> # open 0
> LV Size 39,06 GB
> Current LE 625
> Segments 1
> Snapshot chunk size 4,00 KB
> Allocated to snapshot 100,00%
> Allocation inherit
> Read ahead sectors 0
> Block device 253:8
>
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