While receiving a disk drive reading command, the system sequentially reads and processes {HEAD ~ the data} in {TAIL ~ response} to a data processing length parameter in the data of the disk drive saved in the free memory space in accordance with the disk drive reading command and the data processing length parameter 
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While receiving a disk drive reading command , the system sequentially reads and processes { HEAD ~ the data } in { TAIL ~ response } to a data processing length parameter in the data of the disk drive saved in the free memory space in accordance with the disk drive reading command and the data processing length parameter
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL 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