hard drive components

machinist

The actuator is an electronic device that is controlled by a motor that moves inside the arm of the hard disk, and in the past the actuator was controlled inside the hard disk by a stepper motor, and the actuator is controlled in contemporary time in Most often by means of a servo motor.

reading and writing arm

The Read/Write Arm controls the movement of the reading and writing heads, and its function is to actually read and write on the disk cylinders by converting the magnetic surface into an electric current, and the reading and writing arm is important in knowing whether the reading and writing heads are In place based on the data that needs to be written or accessed, this arm is also called the vertical arm or actuator arm.

read-write head

A read/write head is a device located on the arm of a hard disk drive that is used to read and write data from a circular hard disk disk. Hard disks usually have one read and write head on each side of a circular disk. Each head on the circular magnetic disks is in a state of rest, and these heads move when the circular magnetic disks begin to rotate rapidly, which causes a large air current that causes the heads to rise above the circular magnetic disks.

The axis of rotation

The circular magnetic disk must be rotated so that the head arm and the operator can fully utilize the surface area of ​​the disk. Most drives today are high-speed, with an average speed of 4800-7200 revolutions per minute, and the drive becomes faster as the magnetic disk rotates every minute, and this means less time in reading and writing data, and recently work has been done to increase the speed of reading and writing from By creating a disk drive based on moving parts by using silicon as a data transfer medium instead of a circular magnetic disk.

Circular magnetic disk

A circular magnetic disk (in English: Platter) is a disk of glass, aluminum, or ceramic coated in magnetic media, and this disk is located within the hard drive in order to store all computer data permanently, and these circular magnetic disks will rotate in a number of Many revolutions per minute when the computer is running, and the rotation rate varies depending on the different model of hard drive in the computer.

As for the number of circular magnetic disks that are found in the hard disk, it depends on the real size of the hard disk drive, and on the manufacturer and its capacity, so there is no certain number of circular magnetic disks in the hard disk drive in the computer, and it is found in all hard disk drives Modern disks are two circular magnetic disks or more than two, and in the case of a drive that is (SSD), there is no circular magnetic disk inside it, and there is also in the back of the hard disk drive a circular plate called the disk control unit and this works in connection with the drive computer hard disks.