FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -They are replaced by so called-servomechanism. Head arm movement is secured and controlled by changing amplitude and polarity of current through the voice coil in the field of permanent magnet.

Detailed explanation-2: -The access arm is directed by instructions in the operating system to move the head to a specific track, and the rotation of the platter positions it over the required sector. Also called an “actuator arm” because the actuator is the motor and mechanism that moves the arm.

Detailed explanation-3: -Actuator. The actuator or head actuator is a small motor that takes instructions from the drive’s circuit board to control the movement of the read/write arm and supervise the transfer of data to and from the platters. It’s responsible for ensuring the read/write heads are in exactly the right place at all times.

Detailed explanation-4: -Alternatively called the read/write head arm, head arm, or actuator arm, the access arm is in every mechanical hard drive with a similar to the arm of a record player. As the platter spins, the access arm adjusts along the axis point to move the read/write heads to read, write, or delete information.