Method for controlling air pressure in an evacuated disk drive
US6700726B1 · kind B1 · utility
14Cited by
10References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2000 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Jan 24, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive controller controls a vacuum pump to establish a vacuum within a disk drive housing to conserve power while ensuring that the head of the drive does not crash into the disk. The controller compares actual spindle power to a predetermined maximum power threshold and actual fly height to a calibration fly height to control the pump. The calibration values are derived by comparing no-load and loaded values for a parameter, e.g., error rate, disk temperature, and so on.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.