wherein {TAIL ~ 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 an operation mode of said first intermediary port continues to be {HEAD ~ a power saving mode} 
wherein { TAIL ~ 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 an operation mode of said first intermediary port continues to be { HEAD ~ a power saving mode }
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD