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Re: [linux-lvm] Can't get rid of INACTIVE read/write snapshot



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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