Patent ID: 7802029

Claim:
A system, comprising: a memory; and a processor coupled to the memory, wherein the processor performs operations, the operations comprising: (a) receiving, at a first storage unit, an I/O command from a host; (b) generating an identifier that identifies a destination that is a second storage unit to which the I/O command is to be transmitted from the first storage unit; (c) augmenting the I/O command with the generated identifier at the first storage unit; and (d) transmitting the augmented I/O command, wherein the first storage unit is a first storage control unit, wherein the second storage unit is a second storage control unit, and wherein generating the identifier further comprises: (i) associating with the identifier, a World Wide Node Name of the second storage control unit; (ii) associating with the identifier, a World Wide Port Name of a port of a fibre channel adapter coupled to the second storage control unit, wherein the port is used for communications; and (iii) associating with the identifier, a storage subsystem identification of a storage subsystem coupled to the second storage control unit.