公开(公告)号：JP2002133771A

公开(公告)日：2002-05-10

申请号：JP2001252291

申请日：2001-08-23

Applicant: ST MICROELECTRONICS INC

Inventor： WILSON AARON W ,  MATTISON RODNEY A ,  JOSEPHSON RUSSELL B

IPC: G11B20/10 ,  G11B19/28

Abstract: PROBLEM TO BE SOLVED: To provide a technique for compensating a variation in the spin speed of a data storage medium from a nominal, i.e., designed spin speed. SOLUTION: The nominal spin speed for the data storage medium in a specific magnetic disk storage system is provided, then the actual spin speed of the data storage medium is measured. The spin speed variation is determined by comparing the measured spin speed with the nominal spin speed. A correction coefficient is calculated based on a spin speed error, and it is applied to at least one data transfer parameter such as a channel reference frequency or read/write gate activation timing before it is applied to a subsequent data transfer process. Whether the measured spin speed is in an allowable spin speed range or not can be verified at this time.