The intermediary device includes {HEAD ~ a power saving control function} for the disk device and carries out {TAIL ~ operation control} such as spin off and spin up of disk devices in accordance with conditions set in advance 
The intermediary device includes { HEAD ~ a power saving control function } for the disk device and carries out { TAIL ~ operation control } such as spin off and spin up of disk devices in accordance with conditions set in advance
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH