Disk drive for circular self servo writing and spiral self servo writing using prewritten reference servo bursts
US6977789B1 · kind B1 · utility
141Cited by
20References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 31, 2002 |
| Grant date | Dec 20, 2005 |
| Priority date | — |
| Expiry date | Oct 27, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59655
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed comprising a disk and a head actuated radially over the disk. An external servo writer is used to write reference servo bursts to the disk at a coarser radial resolution than product servo bursts. During a self servo writing operation, the reference servo bursts are processed to servo circularly to write a first set of product servo bursts to the disk. The reference servo bursts are also processed to servo spirally to write a second set of product servo bursts to the disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.