Disk drive accounting for sinusoidal offset between heads when executing a rotational position optimization algorithm
US8824262B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2013 |
| Grant date | Sep 2, 2014 |
| Priority date | — |
| Expiry date | Oct 11, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5578
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed wherein a radial offset is measured between a first head and a second head at a plurality of points along a circumference of a corresponding first and second disk surface to generate a first plurality of radial offsets. A first radial offset is determined and a second radial offset is determined based on the first plurality of radial offsets, wherein the first radial offset corresponds to approximately a maximum in the first plurality of radial offsets and the second radial offset corresponds to approximately a minimum in the first plurality of radial offsets. A plurality of access commands are stored in a command queue, and a rotational position optimization (RPO) algorithm is executed to select a next access command to execute from the command queue, wherein the RPO algorithm is responsive to the first and second radial offsets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.