Described are a storage network and method of presenting a virtual array
in the storage network. The storage network includes a first storage
array and a second storage array. At least one of the first and second
storage arrays has one or more logical units of storage assigned to a
virtual array that spans the first and second storage arrays. In
addition, at least one of the first and second storage arrays has one or
more physical ports coupled to the virtual array. The virtual array is
assigned a unique virtual port identifier (ID) for each physical port
coupled to the virtual array. A host coupled to a switch can communicate
with the virtual array using a virtual port ID assigned to the virtual
array.