Optimizing storage capacity by smoothly varying track pitch across a disk surface
US7573666B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 10, 2007 |
| Grant date | Aug 11, 2009 |
| Priority date | — |
| Expiry date | Feb 27, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59638
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for operating a fixed media hard disk drive using a plurality of disks on each of which the ratio of servo track pitch to data track pitch is smoothly varied across the surface of the disk as data is being written. The method allows the density of data on each disk to be independently varied, the total data capacity of a disk to be independently varied and introduces a degree of flexibility into the process of testing disk formatting. The method includes the use of a smooth and continuous function having a set of adjustable parameters, by whose definition a relationship between the two pitches is established within the data band. The method can also be applied to disks that are divided into radial zones to take advantage of additional properties of data writing and reading within a hard disk drive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.