Apparatus for providing new servo information on a disk without entirely erasing old servo information
US6049437A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1997 |
| Grant date | Apr 11, 2000 |
| Priority date | — |
| Expiry date | Feb 28, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59672
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.