title: pacemaker+corosync+DRBD 'unknown error' (1)
body: <p>i have configured DRBD,corosync,pacemaker in mysystem..it works well when i have only one resource group. but i face the below problem when i added one more resource group. </p>
  
  <p>crm_mon -f  // shows below error</p>
  
  <p>Migration summary:
  * Node cent64asf1:
  * Node cent64asf2:
     r1_fs: migration-threshold=1000000 fail-count=1000000 last-failure='Sat Aug 23 18:00:45 2014'</p>
  
  <p>Failed actions:
      r1_fs_start_0 on cent64asf2 'unknown error' (1): call=98, status=complete, last-rc-change='Sat Aug 23 18:00:45 2014', queued=107ms, exec=0ms</p>