Patent ID: 7196513
Filing Date: 2007-03-27
Classification: G11B

Abstract:
1. A testing method for a magnetic hard disk or a magnetic head in a test system comprising: a moving step in which the magnetic head moves to fly closely over the magnetic disk to a predetermined radial position corresponding to a position data of the magnetic disk which rotates at a predetermined constant speed; a data writing step in which a predetermined encoded digital data is written on a data area of each sector while sectors imbedded position data is read out and stored, said writing step being performed for at least one rotation of said magnetic disk; a reading step in which an encoded data of each sector is read out for data error detection when a read position data of that sector is one of equal to the stored position data at the writing step and a difference between the read position data and the stored position data is within an allowable range, said reading step being performed for at least one rotation of the magnetic disk.