Samsung Electronics Co., Ltd.

William E Wevers

Me Van Le

The present invention is a method and apparatus for providing positional information of a disk. The disk has at least one side with a plurality of tracks, each having a first burst in a first servo field and a second burst in a second servo field. The first burst provides a first portion of track position information while the second burst provides a second portion of track position information. When combined, the first and second portions provide a position of a corresponding track. Each track further includes a third and a fourth burst that provides a first portion and a second portion of disk side position information. When combined, the first and second portions of disk side position information provide the disk side position of the disk. Each track also includes a burst that provides the quadrant position of the disk. In one embodiment, the first and second bursts are located on consecutive sectors, and each track includes a servo sector sequence burst with a sector sequence number that identifies the sequence position of the consecutive sectors. The first portion, the second portion and their corresponding sector sequence number in combination provide a position of a corresponding track.

Method and apparatus for providing positional information on a disk

The present invention is a method and apparatus for rewriting servo information on a disk of a hard disk drive. The old servo data is erased after the new servo data has been written, using a stagger erase method. A disk pack having n sides is provided, where each of the n sides has a plurality of tracks, and each side is divided into a plurality of sectors. A first set of servo information is written on an nth sector of a track on an nth side of said disk pack. This step is repeated for n=1 through n, for every sector of the track for each side of the disk pack. Next, data is erased from one of every n sectors of the track on each side of said disk pack. The entire process is repeated for a predetermined number of tracks on each side of the disk pack. In an alternate embodiment, the data is erased from a first track while the read/write heads of the hard disk drive are being moved from the first track to a second track.

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San Jose, CA, United States of America

William E Wevers