| 摘要 |
PURPOSE:To execute at a high speed write and read-out of a file to a disk by bringing one head which comes first onto a track to which an access designation is given, or one heat which detects first a sector on the track, to an access preferentially, and making it prepare for an access to the next track. CONSTITUTION:A control part in a disk 3' executes a data transfer between a system but BUS connected to a CPU 1 and each head controller 171, 172, under a control of an IO processor 16, and also can give various control commands to each head controller 171, 172 in accordance with a control signal CNT which is sent from the CPU 1. Especially, this device is provided with a control means by which each head is driven independently under a control of each head controller 171, 172, and its movement to the next track is executed by the other head in the course of an access of some track on the disk surface 5 by one head. |
