Disk servo information writing method

Abstract

A writing method of magnetic disk servo information is disclosed which belongs to the information storage method of magnetic recording device. The invention diminishes job programs in the clean room and reduces the cost of manufacture. The steps of invention are: (1) in clean room, the outer servo writing device writes in the pre-writing servo track on the disc; (2) the low frequency synchronous signals in the pre-writing servo track is read by the disc driver to generate the resumed signal of coarse timing, and the high frequency synchronous signals is read by the disc driver to generate the resumed signal of accurate timing; (3) the servo writing clock signal is generated using the resumed signal of coarse timing and the resumed signal of accurate timing; (4) using the servo writing clock signal, the magnetic head is driven along the concentric circles data trace by the inner control circuit of the disk driver to generate the real servo information. The invention could improve the coefficient of utilization of clean room greatly based on the present servo writing device, accelerate the writing speed, improve the coefficient of utilization of the key source, and reduce the cost of manufacture.

Description

technical field [0001] The invention belongs to an information storage method of a magnetic recording device, in particular to a magnetic disk servo information writing method. Background technique [0002] A disk drive is a magnetic recording device used for information storage. The disk is mounted on a motor, and information is read and written by a read / write head mounted to an actuator arm driven by a voice coil motor, which is excited by an electric current to turn the actuator and move the head. Information is usually recorded on concentric tracks on the surface of a disk. To facilitate data storage and retrieval in a regular manner, information on a disk is usually arranged in blocks called sectors. [0003] The movement of the magnetic head is controlled by the servo system by reading the servo information. By reading the servo information, the actual radial position of the magnetic head is determined, and compared with the required radial position of the magnetic ...

AI Technical Summary

Problems solved by technology

However, the external servo writing equipment is quite expensive, and requires a clean room environment to ensure that the Micro-E is accurately positioned on the platter, and electrostatic discharge will damage the platter during the installation of the disk platter

Therefore, expensive external writing equipment has become a bottleneck that seriously affects disk manufacturing costs

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