[one-users] VMs going into suspend

[Manish Sapariya]

Hi,
I am running OpenNebula 2.9.80.
I have two nodes one with CentOS 5.6 and one with CentOS 6.3.

On the CentOS 6.3 host my all VMs frequently go suspended state
and I am failing to recover them.

When I looked at the libvirtd log it says

block I/O error in device 'drive-virtio-disk0': No space left on device

Google did not help me to get to conclusive solution.

Has anybody ran into similar problem?
Should I revert my node back to CentOS 5.6 and older version of
libvirt?

Thanks for any help.
-- 
Regards,
Manish