Patent ID: 6021028
Filing Date: 2000-02-01
Classification: G11B

Abstract:
A method of writing servo data related to record tracks onto a high density flexible recording magnetic disk with a servo writer, the method comprising the steps of:preparing a flexible magnetic disk having a recording capacity of 20 MB or higher per side;placing the flexible disk into a jacket which houses the flexible magnetic disk in a rotatable manner wherein soft sheet members for preventing surface rippling are arranged on both sides of the flexible magnetic disk within the jacket such that each of the sheet members covers substantially an entire recording surface of the flexible magnetic disk except for regions where the servo data is to be written by the servo writer wherein the soft sheet members prevent writing errors to thereby accurately record servo data;mounting the jacket containing the flexible magnetic disk and the soft sheet members on a drive means of the servo writer which rotates the flexible magnetic disk in the jacket, wherein the jacket containing the flexible magnetic disk is removably mounted to the drive means of the servo writer; andwriting the servo data onto the flexible magnetic disk while rotating the flexible magnetic disk in the jacket at a rotation speed of 2000 rpm or higher.