Mechanical hard disk and its control method

Abstract

The invention discloses a mechanical hard disk, which comprises a shell, a plurality of magnetic disk pieces, a magnetic disk spindle, a plurality of magnetic heads, a plurality of magnetic head rocker arms, a magnetic head rocker arm shaft and a plurality of electromagnetic devices and a logic control circuit, and is characterized in that the plurality of magnetic disk pieces, the magnetic disk spindle, the plurality of magnetic heads, the plurality of magnetic head rocker arms, the magnetic head rocker arm shaft and the plurality of electromagnetic devices are arranged inside the shell; the logic control circuit is arranged inside out outside the shell; the side, which is opposite to a storage surface of the corresponding magnetic disk piece, of each magnetic disk rocker arm is provided with at least one electromagnetic device, the electromagnetic devices can generate a magnetic field at an on-state, and the magnetic field disappears when the electromagnetic devices are at an off-state; and the logic control circuit is connected with the plurality of electromagnetic devices, and switches on the electromagnetic devices when receiving a data destroying instruction so as to perform re-magnetization processing on the magnetic disk pieces in the operating process of the mechanical hard disk. The mechanical hard disk disclosed by the invention can delete data quickly and completely, and the data security is high. The invention further discloses a control method applied to the mechanical hard disk.

Description

technical field [0001] The invention belongs to the technical field of storage devices, and in particular relates to a mechanical hard disk and a control method thereof. Background technique [0002] Mechanical hard disk is a traditional storage device and has been widely used. At present, two processing methods are usually used to delete data stored in mechanical hard disks. [0003] The first processing method: modify or delete the metadata describing the file or file unit of the data that needs to be deleted in the mechanical hard disk. Using this processing method can achieve instant data deletion, but its disadvantage is that the data in the storage unit of the mechanical hard disk has not been completely erased, and the data can still be recovered through technical means, which has low security. [0004] The second processing method: For the data that needs to be deleted in the mechanical hard disk, use the magnetic head to write useless filling characters in the dat...

AI Technical Summary

Problems solved by technology

Using this processing method can realize instant deletion of data, but its disadvantage is: the data in the storage unit of the mechanical hard disk has not been completely erased, and the data can still be recovered through technical means, which is less secure

However, to completely delete the data in the mechanical hard disk by filling character overwriting, the processing speed is slow and it takes a long time

Images