wherein an operation mode of said second intermediary port is not a power saving mode and said intermediary device is configured to access said second disk device via said second intermediary port while {HEAD ~ an operation mode} of {TAIL ~ said first intermediary port} continues to be a power saving mode 
wherein an operation mode of said second intermediary port is not a power saving mode and said intermediary device is configured to access said second disk device via said second intermediary port while { HEAD ~ an operation mode } of { TAIL ~ said first intermediary port } continues to be a power saving mode
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH