RHEL 6.4 NFS server VM Oracle archive logs fail to write

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I have an Oracle DB on a Solaris 10 platform trying to write secondary archive logs to an NFS share hosted on a RH VM. The Oracle processes writes the file name and size but no data then hangs the DB. I successfully generated 256m files with mkfile from the Solaris box. This seem to be a problem only with the Oracle DB processes other applications are working fine. Currently configure for nfsv3.
Are there any specific RH NFS server configurations for exporting the share? Kernel parameters? Should I try to mimic an Oracle configuration in RH?

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