Thank you very much for the reply, the output shows the following
[root@oravms ~]# exportfs
Now bit more about my infrastructure
I have installed the Oracle VM server on VirtualBox 4.1.8, as I mentioned with my post, Oracle VM server is a bare metal installation (no gui) and the NFS share is one of the methods which allows Oravle VM Manager to import Oracle templates to repositories which are read and write-able by the VM Server itself.
ie, when I import a template, the zipped template is downloaded to VM server's local storage, here in this case NFS share folders and VM server unpack the templates to virtual disks and other included with the zipped file
My host, Windows 7 64bit Professional edition desktop has 16GB memory, i7 processor, 2 NIC cards.
1 NIC is dedicated for the VM server and the other one is set for the VM manager (as suggested by geeks from oracle support)
My problem is, my NFS share locks up or the VM server goes on a reboot whenever the unpacking starts and reaches a particular level (for ex, the unzipped archive should contribute a 55gb extracted files, once around 20gb unpacked, either the NFS share gets locked up or the VM server reboots)
following a suggestion I changed the /etc/exports like following
/var/storage1 192.168.0.20(rw,insecure,async,no_root_squash,nohide) 192.168.0.23(rw,insecure,async,no_root_squash,nohide)
/var/storage2 192.168.0.20(rw,insecure,async,no_root_squash,nohide) 192.168.0.23(rw,insecure,async,no_root_squash,nohide)
Still experiencing frequent reboots or NFS share lock-up