[PVE-User] cluster not ready - no quorum? (500)

[para zheng]

hi, dear all

     when i create one VM just now, i found this error:

"cluster not ready - no quorum? (500)"
and
Formatting '/var/lib/vz/images/184/vm-184-disk-1.raw', fmt=raw size=34359738368
TASK ERROR: create failed - unable to open file
'/etc/pve/nodes/server1/qemu-server/184.conf.tmp.858209' - Device or
resource busy

root at server1:/etc/pve/local# pvecm nodes
Node  Sts   Inc   Joined               Name
   1   M   2136   2012-10-09 11:28:00  server1
   2   X      0                        server2
   3   X      0                        server3
   4   X      0                        server4
   5   X      0                        server5
   6   X      0                        server6
   7   X      0                        server8
   8   X      0                        server7
   9   X      0                        server9

all the nodes are disconnected.

root at server2:~# pvecm nodes
Node  Sts   Inc   Joined               Name
   1   X   2124                        server1
   2   M   2120   2012-09-22 08:05:23  server2
   3   X   2120                        server3
   4   X   2132                        server4
   5   X   2120                        server5
   6   X   2128                        server6
   7   X   2120                        server8
   8   X   2120                        server7
   9   X   2120                        server9

then I restart the CMAN, but it failed...

root at server1:/etc/pve/local#  service cman start
Starting cluster:
   Checking if cluster has been disabled at boot... [  OK  ]
   Checking Network Manager... [  OK  ]
   Global setup... [  OK  ]
   Loading kernel modules... [  OK  ]
   Mounting configfs... [  OK  ]
   Starting cman... [  OK  ]
   Waiting for quorum... Timed-out waiting for cluster
[FAILED]

 i am confused that what caused this happened?anyone comes across this
issue and how to solve this? many thanks!

cheers,
para