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公开(公告)号：JP2000011565A
公开(公告)日：2000-01-14
申请号：JP16616599
申请日：1999-06-14
Applicant: IBM
Inventor： MARIO BROWN , WILLIAM JOHN CABELACK , LEWIS JOSEPH SERRANO , MANTLE MAN-HON YU
Abstract: PROBLEM TO BE SOLVED: To provide error correcting and detecting method and device for retrieving prescribed data, servo data, for example, from a disk position error signal(PES) field in a data storage device. SOLUTION: In a preferable embodiment, PES data, a truck number, for instance, is mapped into a cord word of an error correcting coding(ECC), the cord word is further divided into one set of symbols, and these symbols are mapped into a second bit/vector group having a specified weight. A preferable encoding method is selected in order to equalize an analog signal characteristic of the PES field. As a result, the change in the conventional servo detector is made to a minimum, even if necessary, as this PES field is used as both of the analog information and digital information.
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公开(公告)号：JP2000021105A
公开(公告)日：2000-01-21
申请号：JP16617699
申请日：1999-06-14
Applicant: IBM
Inventor： MARIO BROWN , WILLIAM JOHN CABELACK , LEWIS JOSEPH SERRANO , MANTLE MAN-HON YU
Abstract: PROBLEM TO BE SOLVED: To provide a disk to be used in a dive drive and a method of manufacturing the same disk. SOLUTION: In the position error signal(PES) field of every track on the disk, encoded predetermined data, for example, servo data is written. In the preferred embodiment, a) data, for example, track number is mapped to the code word of error correcting code(ECC), b) code is encoded for further redundancy using a bit vector and c) unprocessed data written to the PES field is restricted and an analog signal characteristic used by the servo system for positioning is equalized. Therefore, this method enables that PES field can be used as the source of digital data recorded with resistance to trouble while it is used as in the prior art.
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