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Subjectcan't recover ext4 on lvm from ext4_mb_generate_buddy:739: group 1687, 32254 clusters in bitmap, 32258 in gd

I'm having some troubles with a ext4 filesystem on LVM, it seems bricked and fsck doesn't seem to find and correct the problem.

Steps:
1) fsck -v -p -f the filesystem
2) mount the filesystem
3) Try to copy a file
4) filesystem will be mounted RO on error (see below)
5) fsck again, journal will be recovered, no other errors
6) start at 1)


I think the way i bricked it is:
- make a lvm snapshot from that lvm logical disk
- mount that lvm snapshot as RO
- try to copy a file from that mounted RO snapshot to a diffrent dir on the lvm logical disk the snapshot is from.
- it fails and i can't recover (see above)


Is there a way to recover from this ?



[ 220.748928] EXT4-fs error (device dm-2): ext4_mb_generate_buddy:739: group 1687, 32254 clusters in bitmap, 32258 in gd
[ 220.749415] Aborting journal on device dm-2-8.
[ 220.771633] EXT4-fs error (device dm-2): ext4_journal_start_sb:327: Detected aborted journal
[ 220.772593] EXT4-fs (dm-2): Remounting filesystem read-only
[ 220.792455] EXT4-fs (dm-2): Remounting filesystem read-only
[ 220.805118] EXT4-fs (dm-2): ext4_da_writepages: jbd2_start: 9680 pages, ino 4079617; err -30
serveerstertje:/mnt/xen_images/domains/production# cd /
serveerstertje:/# umount /mnt/xen_images/
serveerstertje:/# fsck -f -v -p /dev/serveerstertje/xen_images
fsck from util-linux-ng 2.17.2
/dev/mapper/serveerstertje-xen_images: recovering journal

277 inodes used (0.00%)
5 non-contiguous files (1.8%)
0 non-contiguous directories (0.0%)
# of inodes with ind/dind/tind blocks: 41/41/3
Extent depth histogram: 69/28/2
51890920 blocks used (79.18%)
0 bad blocks
41 large files

199 regular files
53 directories
0 character device files
0 block device files
0 fifos
0 links
16 symbolic links (16 fast symbolic links)
0 sockets
--------
268 files
serveerstertje:/#



System:
- Kernel 3.2.0
- Debian Squeeze with:
ii e2fslibs 1.41.12-4stable1 ext2/ext3/ext4 file system libraries
ii e2fsprogs 1.41.12-4stable1 ext2/ext3/ext4 file system utilities



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