Hi MKGuy,
Thanks for your reply. I understand that the iSCSI protocol is only use for block storage devices. Thus, it is not able to track file level changes when it is mounted to a Guest OS.
In order for me to view the file-level changes real-time, I have to use the CIFS protocol on these Windows Guest OS.
My current RDM configuration will allow me to simultaneously write to this LUN since the LUN writes command will be sent directly to the storage which I believe the storage file system (We are using NetApp) supports that.