For the NetApp FAS systems, a logical unit (LU) is a subdirectory in an internal file system.
LUs that are exported by the NetApp FAS system report identification descriptors in the vital product data (VPD). The Lenovo Storage V series clustered system uses the LUN-associated binary type-3 IEEE Registered Extended descriptor to identify the LU. For a NetApp LUN that is mapped to the Lenovo Storage V series system, set the LUN Protocol Type to Linux.
The NetApp FAS system does not use LU groups so that all LUs are independent. The LU access model is active-active. Each LU has a preferred filer, but can be accessed from either filer. The preferred filer contains the preferred access ports for the LU. The Lenovo Storage V series system detects and uses this preference.
The NetApp FAS reports a different worldwide port name (WWPN) for each port and a single worldwide node name (WWNN).