Apparatus for providing new servo information on a disk without

Details Apparatus for providing new servo information on a disk without Apparatus for providing new servo information on a disk without

1997-02-28

2000-04-11

Hindi, Nabil

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data in specific format

360 75, 360 7708, G11B 509, G11B 5012

Patent

active

060494379

ABSTRACT:
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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