As shown in FIG 1, {HEAD ~ an optical disk} 11 is rotated by {TAIL ~ a motor} 12, and duringthis rotation, data is written to the optical disk 11 through an optical head 13, or data recorded on the optical disk 11 is read through the optical head 13 
is rotated by
As shown in FIG 1 , { HEAD ~ an optical disk } 11 is rotated by { TAIL ~ a motor } 12 , and duringthis rotation , data is written to the optical disk 11 through an optical head 13 , or data recorded on the optical disk 11 is read through the optical head 13
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL 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