Ref:http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Configuration_Example_-_NFS_Over_GFS/NFS_GFS_Troubleshoot.html If you find that you are seeing error messages when you try to configure your system, or if after configuration your system does not behave as expected, you can perform the following checks and examine the following areas. * Connect to one of the nodes in the cluster and execute the clustat(8) command. This [...]