The Lenovo Storage V series system
and the HDS USP or NSC have limitations in switch zoning.
The Lenovo Storage V series system
can be connected to the HDS USP or NSC with the following restrictions:
- If an LU is mapped to a system port as LUN x, the LU must
appear as LUN x for all mappings to target ports.
- Only Fibre Channel connections can be used
to connect the Lenovo Storage V series system
to the HDS USP or NSC system.
- The system limits the number of worldwide node names (WWNNs)
for each storage system and the HDS USP and NSC present a separate
WWNN for each port. Because of these circumstances, the number of
target ports that the system can resolve as one storage system is
limited. To provide connections to more target ports, complete
the following steps:
- Divide the set of target ports into groups of 2 to 16.
- Assign a discrete set of LUs to each group.
The system can then view each group of target ports and the
associated LUs as separate HDS USP or NSC systems. You can repeat
this process to use all target ports.
Note: The HDS USP and NSC systems present themselves to the Lenovo Storage V series clustered system as separate controllers for each port zoned to the Lenovo Storage V series system. For example, if one of these storage systems has four ports that
are zoned to the system, each port appears as a separate controller
rather than one controller with 4 WWPNs. In addition, a given logical
unit (LU) must be mapped to the system through all controller ports
that are zoned to the system by using the same logical unit number
(LUN).
Controller splitting
You can split the HDS
USP or NSC between other hosts and the system under the following
conditions:
- A host cannot be simultaneously connected to both an HDS USP or
NSC and the Lenovo Storage V series system.
- Port security must be enabled for target ports that are shared.
- An LU that is mapped to the system cannot be simultaneously mapped
to another host.