SnapDrive for UNIX has a few considerations for provisioning RDM LUNs.
Verify that the configuration variable default-transport variable is set as fcp in the snapdrive.conf file in the guest operating system.
Configure SnapDrive for UNIX to access the NetApp Virtual Storage Console for VMware vSphere.
Ensure that the configuration variables for RDM LUN support are used in the snapdrive.conf file. The variables such as contact-viadmin-port, use-https-to-viadmin, vif-password-file and virtualization-operation-timeoutsecs=600 are used for RDM LUN support.