An LDEV, an unallocated volume is mapped to a host as a logical unit (LU).
When provisioning your storage system, and after configuring ports, hosts, and host groups, you must configure Fibre Channel LU paths. You can also modify the LU path configurations when the system is in operation.
Multipathing best practice is a Single-Initiator Single-Targets configuration in which each HBA has only one path to the same LU. For example, you can provide four paths to each LU if you have four HBAs. For details, contact customer support.