MAGNETIC DISK APPARATUS

摘要

A magnetic disk apparatus has a base frame on which a magnetic disk having a head landing zone is carried. A magnetic head is supported by a carriage which is disposed on the base frame to be movable between a stop position where the head is located on the head landing zone of the disk and a position where the head is located on the outer peripheral edge portion of the disk. The carraige is urged by a first urging member to the stop position and is moved by a carriage drive mechanism. A lock member is disposed on the base frame to be movable between an engaged position where the lock member engages the carriage in the stop position to hold it therein and a disengaged position off the path of travel of the carriage. The lock member is urged by a second urging member to the engaged position and is held in the disengaged position by a solenoid when it is energized. After the electric power supplied to the carriage drive mechanism, the solenoid and a disk drive motor for rotating the disk is cut off, the solenoid is energized for a predetermined period by a power supply unit.