Mounting should look like the example below. Do not remove "/share/" this is needed. Change the /share_name/ to your NAS share that you have named so if it is "data" then this would be /share/data /mnt.
mount -t nfs IP_addr:/share/share_name /local_mount_point
I thought your question was "What is the solution to see the ''real path'' (something like /mnt_shares/lv00/nas/mydir/)" are you not seeing the mount when using the correct mount example mount -t nfs IP_addr:/share/share_name /local_mount_point ? For enabling the BrightStor client we have integrated Universal Agent for BrightStor ARCserve Backup 9 in Open-E NAS Enterprise.
BrightStor:
Allow IP or Network IP
Please enter the Backup server's IP address in order to grant access to the NAS. If you leave this field empty, all BrightStor backup servers in the network will have access to the NAS server.
User
By providing a user name, only this BrightStor user will have access to the NAS. If left empty, all users will be able to access the NAS server.
Before you'll start to backup your data, you have to configure device that backup will be made to and add your NAS server as source. Please follow these steps in order to complete it.