• Error in XenCenter - SR failed to complete the operation
• Error in /var/log/SMlog

-[25840] 2012-12-14 10:52:35.402274 lock: released /var/lock/sm/lvm-579fdc35-f120-398e-397e-b12179c9531c/83b6fcfd-e9ed-432b-b662-d8d28f9ccca5
[25840] 2012-12-14 10:52:35.402380 lock: closed /var/lock/sm/lvm-579fdc35-f120-398e-397e-b12179c9531c/83b6fcfd-e9ed-432b-b662-d8d28f9ccca5
[25840] 2012-12-14 10:52:35.404959 *** LVHD: EXCEPTION XenAPI.Failure, ['XENAPI_PLUGIN_FAILURE', 'multi', 'CommandException', '5']
File "/opt/xensource/sm/LVMSR", line 1985, in ?
SRCommand.run(LVHDSR, DRIVER_INFO)
File "/opt/xensource/sm/SRCommand.py", line 307, in run
sr = driver(cmd, cmd.sr_uuid)
File "/opt/xensource/sm/SR.py", line 136, in __init__
self.load(sr_uuid)
File "/opt/xensource/sm/LVMSR", line 196, in load
self._undoAllJournals()
File "/opt/xensource/sm/LVMSR", line 1043, in _undoAllJournals
self._undoAllInflateJournals()
File "/opt/xensource/sm/LVMSR", line 1071, in _undoAllInflateJournals
self.vgname, vdi.lvname, uuid)
File "/opt/xensource/sm/lvhdutil.py", line 302, in lvRefreshOnAllSlaves
lvRefreshOnSlaves(session, srUuid, vgName, lvName, vdiUuid, slaves)
File "/opt/xensource/sm/lvhdutil.py", line 297, in lvRefreshOnSlaves
text = session.xenapi.host.call_plugin(slave, "on-slave", "multi", args)
File "/usr/lib/python2.4/site-packages/XenAPI.py", line 234, in __call__
return self.__send(self.__name, args)
File "/usr/lib/python2.4/site-packages/XenAPI.py", line 138, in xenapi_request
result = _parse_result(getattr(self, methodname)(*full_params))
File "/usr/lib/python2.4/site-packages/XenAPI.py", line 208, in _parse_result
raise Failure(result['ErrorDescription'])

There was an SR backend failure.
status: non-zero exit
stdout:
stderr: Traceback (most recent call last):
  File "/opt/xensource/sm/LVMoHBASR", line 235, in ?
    SRCommand.run(LVHDoHBASR, DRIVER_INFO)
  File "/opt/xensource/sm/SRCommand.py", line 325, in run
    sr = driver(cmd, cmd.sr_uuid)
  File "/opt/xensource/sm/SR.py", line 135, in __init__
    self.load(sr_uuid)
  File "/opt/xensource/sm/LVMoHBASR", line 98, in load
    self._pathrefresh(LVHDoHBASR)
  File "/opt/xensource/sm/SR.py", line 466, in _pathrefresh
    super(obj, self).load(self.uuid)
  File "/opt/xensource/sm/LVHDSR.py", line 196, in load
    self._undoAllJournals()
  File "/opt/xensource/sm/LVHDSR.py", line 1046, in _undoAllJournals
    self._handleInterruptedCoalesceLeaf()
  File "/opt/xensource/sm/LVHDSR.py", line 807, in _handleInterruptedCoalesceLeaf
    cleanup.gc_force(self.session, self.uuid)
  File "/opt/xensource/sm/cleanup.py", line 2614, in gc_force
    sr.scanLocked(force)
  File "/opt/xensource/sm/cleanup.py", line 1306, in scanLocked
    self.scan(force)
  File "/opt/xensource/sm/cleanup.py", line 2152, in scan
    self._handleInterruptedCoalesceLeaf()
  File "/opt/xensource/sm/cleanup.py", line 2232, in _handleInterruptedCoalesceLeaf
    self._finishInterruptedCoalesceLeaf(uuid, parentUuid)
  File "/opt/xensource/sm/cleanup.py", line 2293, in _finishInterruptedCoalesceLeaf
    vdi.inflateFully()
  File "/opt/xensource/sm/cleanup.py", line 959, in inflateFully
    self.inflate(lvhdutil.calcSizeVHDLV(self.sizeVirt))
  File "/opt/xensource/sm/cleanup.py", line 938, in inflate
    lvhdutil.inflate(self.sr.journaler, self.sr.uuid, self.uuid, size)
  File "/opt/xensource/sm/lvhdutil.py", line 176, in inflate
    lvmCache.setSize(lvName, newSize)
  File "/opt/xensource/sm/lvmcache.py", line 44, in wrapper
    ret = op(self, *args)
  File "/opt/xensource/sm/lvmcache.py", line 126, in setSize
    lvutil.setSize(path, newSize, (newSize < size))
  File "/opt/xensource/sm/lvutil.py", line 445, in setSize
    util.pread(cmd)
  File "/opt/xensource/sm/util.py", line 174, in pread
    raise CommandException(rc, str(cmdlist), stderr.strip())
util.CommandException: 5

• VMs with disks on that Storage repository will not boot.
• Cannot add a new Disk to that SR.
• Cannot delete a disk in that SR.

• Copy the disk UUID from the Error message in SMlog
• Run #lvscan | grep -i <UUID_OF_DISK>
• Now you will get an output with the original disk and the inflate disk.
• Now run #lvremove <path_to_inflate_disk>
• Now try to Re-scan the SR - It should work.

• Copy the highlighted portion from the below
• Error in /var/log/SMlog

• -[25840] 2012-12-14 10:52:35.402274 lock: released /var/lock/sm/lvm-579fdc35-f120-398e-397e-b12179c9531c/83b6fcfd-e9ed-432b-b662-d8d28f9ccca5

  
   
• lvscan | grep -i 83b6fcfd-e9ed-432b-b662-d8d28f9ccca5​

• lvremove  /dev/VG_XenStorage-579fdc35-f120-398e-397e-b12179c9531c/inflate_VHD-83b6fcfd-e9ed-432b-b662-d8d28f9ccca5

Problem Cause