Error message from console:
[ 6861.392694] device-mapper: snapshots: Invalidating snapshot: Unable to
allocate exception.
[ 6861.853229] Buffer I/O error on device dm-9, logical block 807738
[ 6861.859330] Buffer I/O error on device dm-9, logical block 807739
[ 6861.865425] Buffer I/O error on device dm-9, logical block 807740
[ 6861.871522] Buffer I/O error on device dm-9, logical block 807741
[ 6861.877611] Buffer I/O error on device dm-9, logical block 807742
[ 6861.883701] Buffer I/O error on device dm-9, logical block 807743
[ 6861.889790] Buffer I/O error on device dm-9, logical block 807744
[ 6861.895880] Buffer I/O error on device dm-9, logical block 807745
[ 6861.901969] Buffer I/O error on device dm-9, logical block 807746
[ 6861.908060] Buffer I/O error on device dm-9, logical block 807747
[ 6863.241993] Aborting journal on device dm-9.
[ 6863.246354] journal commit I/O error
[ 6863.250733] ext3_abort called.
[ 6863.253796] EXT3-fs error (device dm-9): ext3_journal_start_sb: Detected
aborted journal
[ 6863.261916] Remounting filesystem read-only
[ 6871.588208] Buffer I/O error on device dm-9, logical block 0
[ 6872.090790] Buffer I/O error on device dm-9, logical block 391293
dmesg:
[ 6861.392694] device-mapper: snapshots: Invalidating snapshot: Unable to
allocate exception.
[ 6861.853229] Buffer I/O error on device dm-9, logical block 807738
[ 6861.859316] lost page write due to I/O error on dm-9
[ 6861.859330] Buffer I/O error on device dm-9, logical block 807739
[ 6861.865415] lost page write due to I/O error on dm-9
[ 6861.865425] Buffer I/O error on device dm-9, logical block 807740
[ 6861.871511] lost page write due to I/O error on dm-9
[ 6861.871522] Buffer I/O error on device dm-9, logical block 807741
[ 6861.877602] lost page write due to I/O error on dm-9
[ 6861.877611] Buffer I/O error on device dm-9, logical block 807742
[ 6861.883691] lost page write due to I/O error on dm-9
[ 6861.883701] Buffer I/O error on device dm-9, logical block 807743
[ 6861.889780] lost page write due to I/O error on dm-9
[ 6861.889790] Buffer I/O error on device dm-9, logical block 807744
[ 6861.895871] lost page write due to I/O error on dm-9
[ 6861.895880] Buffer I/O error on device dm-9, logical block 807745
[ 6861.901960] lost page write due to I/O error on dm-9
[ 6861.901969] Buffer I/O error on device dm-9, logical block 807746
[ 6861.908049] lost page write due to I/O error on dm-9
[ 6861.908060] Buffer I/O error on device dm-9, logical block 807747
[ 6861.914139] lost page write due to I/O error on dm-9
[ 6863.241993] Aborting journal on device dm-9.
[ 6863.246354] journal commit I/O error
[ 6863.250733] ext3_abort called.
[ 6863.253796] EXT3-fs error (device dm-9): ext3_journal_start_sb: Detected
aborted journal
[ 6863.261916] Remounting filesystem read-only
[ 6871.588199] printk: 10996 messages suppressed.
[ 6871.588208] Buffer I/O error on device dm-9, logical block 0
[ 6871.594315] lost page write due to I/O error on dm-9
[ 6872.090782] printk: 1636 messages suppressed.
[ 6872.090790] Buffer I/O error on device dm-9, logical block 391293
[ 6872.097195] lost page write due to I/O error on dm-9
Output of 'lvs':
lvs
/dev/vg_raid5/snap-raid5: read failed after 0 of 4096 at 4294901760:
Input/output error
/dev/vg_raid5/snap-raid5: read failed after 0 of 4096 at 0: Input/output error
LV VG Attr LSize Origin Snap% Move Log Copy%
lv2_raid1 vg2_raid1 owi-a- 4.00G
snap-raid1-2 vg2_raid1 swi-ao 1.00G lv2_raid1 24.44
lv_raid1 vg_raid1 owi-a- 4.00G
snap-raid1-1 vg_raid1 swi-ao 1.00G lv_raid1 24.44
lv_raid5 vg_raid5 owi-a- 4.00G
snap-raid5 vg_raid5 Swi-Io 1.00G lv_raid5 100.00
Output of 'vgscan'
Reading all physical volumes. This may take a while...
/dev/vg_raid5/snap-raid5: read failed after 0 of 4096 at 4294901760:
Input/output error
/dev/vg_raid5/snap-raid5: read failed after 0 of 4096 at 0: Input/output error
Found volume group "vg_raid5" using metadata type lvm2
Found volume group "vg2_raid1" using metadata type lvm2
Found volume group "vg_raid1" using metadata type lvm2
Output of 'pvscan'
/dev/vg_raid5/snap-raid5: read failed after 0 of 4096 at 4294901760:
Input/output error
/dev/vg_raid5/snap-raid5: read failed after 0 of 4096 at 0: Input/output error
PV /dev/md4 VG vg_raid5 lvm2 [531.07 GB / 526.07 GB free]
PV /dev/md3 VG vg2_raid1 lvm2 [93.13 GB / 88.13 GB free]
PV /dev/md2 VG vg_raid1 lvm2 [93.13 GB / 88.13 GB free]
Total: 3 [717.34 GB] / in use: 3 [717.34 GB] / in no VG: 0 [0 ]
Content of /proc/mdstat:
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4]
[raid10]
md4 : active raid5 sdc3[0] sdf3[3] sde3[2] sdd3[1]
556868928 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU]
md3 : active raid1 sde2[0] sdf2[1]
97659008 blocks [2/2] [UU]
md1 : active raid1 sde1[0] sdf1[1]
9767424 blocks [2/2] [UU]
md2 : active raid1 sdc2[0] sdd2[1]
97659008 blocks [2/2] [UU]
md0 : active raid1 sdc1[0] sdd1[1]
9767424 blocks [2/2] [UU]
unused devices: <none>
--
device-mapper: snapshots: Invalidating snapshot: Unable to allocate exception.
https://bugs.launchpad.net/bugs/177828
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