Abstract:

Servo information is the bottleneck of the hard disk production. Selfservowriting can greatly improve the production efficiency of hard disk servo information. But the radial error accumulation can degrade seriously the quality of servo information written by the selfservowriting process. This paper analyzes the theory and model of selfservowriting. The course and reason of radial error generation are deduced from them. A method is proposed in the paper and the experimental result shows that the growth of radial errors is controlled. 

Key words: servo information;selfservowriting;radial error accumulation