On 10/28/2014 07:57 AM, reynie...@gmail.com wrote:

# lvs
   /dev/root: read failed after 0 of 4096 at 27522957312: Input/output error
   /dev/root: read failed after 0 of 4096 at 27523014656: Input/output error
   Couldn't find device with uuid vSbuSJ-o1Kh-N3ur-JYkM-Ktr4-WEO2-JWe2wS.
   LV      VG           Attr       LSize  Pool Origin Data%  Move Log
Cpy%Sync Convert
   lv_root vg_devserver -wi-ao--p- 25.63g
   lv_swap vg_devserver -wi-ao----  3.91g

Something very strange is going on.  /dev/root is presumably
/dev/mapper/vg_devserve-lv_root.  It is odd that LVM should be looking
inside that LV for another PV, and disturbing that there should be an
I/O error at those offsets, which are within the 27523022848 byte size
of /dev/mapper/vg_devserver-lv_root .

Please post the output from
   ls -l /dev/root /dev/mapper
and the contents of file /etc/lvm/backup/vg_devserver .

--
Bob Nichols     "NOSPAM" is really part of my email address.
                Do NOT delete it.

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