Patent ID: 7633881

Claim:
A method for reducing a number of registered state change notifications (RSCNs) sent to one or more initiators to indicate any respective changes which occurred to a plurality of devices in a storage system, said method comprising: receiving change notifications from changed devices, each change notification including an address of the changed device; buffering the addresses of the changed devices in a register for storing in a pending RSCN frame before sending the pending RSCN frame to the initiators registered to receive RSCNs, wherein an RSCN frame comprises device-specific entries consisting of address information and address validity information for the changed devices, regardless of the type of state change; delaying sending the pending RSCN frame to the initiators until after one or more pre-defined conditions are met; and in response to a single command from one of the initiators for additional information about multiple changed devices, sending the additional information to the initiator.