[Linux-cluster] GFS2: "Could not open" the file on one of the nodes

[cluster lab]

Hi,

In a two node cluster, i received to different result from "qemu-img
check" on just one file:

node1 # qemu-img check VMStorage/x.qcow2
No errors were found on the image.

Node2 # qemu-img check VMStorage/x.qcow2
qemu-img: Could not open 'VMStorage/x.qcow2"

All other files are OK, and the cluster works properly.
What is the problem?

====
Packages:
kernel: 2.6.32-431.5.1.el6.x86_64
GFS2: gfs2-utils-3.0.12.1-23.el6.x86_64
corosync: corosync-1.4.1-17.el6.x86_64

Best Regards