公开(公告)号：JPH0460973A

公开(公告)日：1992-02-26

申请号：JP17039890

申请日：1990-06-29

Applicant: IBM

Inventor： TAKEKOSHI MAKOTO ,  ROORENSU DEII TEIPUTON

IPC: G11B21/08 ,  G11B7/085

Abstract: PURPOSE: To allow an optical head to arrive at a target position in a short period of time by previously storing a relation between the distance to this target position and an index relating to the movement of the optical head heading toward the target position and calculating the number of the track cross signals to be counted during the seek operation when the target position is given. CONSTITUTION: This driving device is provided with a memory means 45 for storing the relation between the distance to the target position and the index relating to the movement of the optical head 11 heading toward the target position and a control means 41 for calculating the number of the track cross signals to be counted during the seek operation by utilizing this relation when the target position is given and generating a control signal for seeking the optical head 11 in accordance with the calculated number of the track cross signals. The counting of the number of the track cross signals to be counted before at least the head arrives at the target position is made possible even if the seek operation is actually not executed. As a result, the need for the reseek operation is eliminated and the completion of the seek operation in the short period of time is made possible.