Abstract
Transfer time simulation in hard disk drive was carried out. Dependence of transfer time on parameters of hard disk drive and shorting of time by multi head system were studied. The relationship between transfer time and rotational speed, average seek time and sector size of hard disk drive was obtained. It was shown that sector allocation for data affected large influence on the transfer time. The result of transfer time of video data by multi head system showed that multi head was effective in the view points of fast access.