Hi all,
one of my lv has become completely unaccessible. Every read access
results in a buffer io error:
Buffer I/O error on dev dm-13, logical block 0, async page read
this goes for every block in the lv. A ddrescue failed on every single
block.
$ lvdisplay
--- Logical volume ---
LV Path /dev/vg0/lv-vm-tviewer
LV Name lv-vm-tviewer
VG Name vg0
LV UUID XdgHFs-RHVZ-9BAH-1ZSK-yiBX-qqf0-273CtT
LV Write Access read/write
LV Creation host, time host1, 2016-02-06 14:58:19 +0100
LV snapshot status INACTIVE destination for lv-vm-tviewer_vorigin
LV Status available
# open 0
LV Size 58.59 GiB
Current LE 15000
COW-table size 5.86 GiB
COW-table LE 1500
Snapshot chunk size 4.00 KiB
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:13
Other lv on the same volume group are healthy. In fact the whole host
runs on the same vg and does not show any problems. Physical volume is a
md raid1 device which is also healthy, as well as its hard disks.
The faulty lv is used as the storage device for a qemu vm, which
suddenly stalled when the io-errors appeared on the host.
Is the any way to diagnose this problem? (centos 7)
Regards
.....Volker
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