Track access control system for magnetic disk system with periodic track offset update
US5109306A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1991 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Aug 2, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5565
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A track access control system for a magnetic disc system including a magnetic disc having a plurality of servo tracks in a plurality of track zones divided in a radial direction, a logical to physical track address translation unit, a track offset update unit, and a control unit, to access a magnetic head at a physical track with offset correction. The track offset update may be carried out in an initial condition, or when a seek command is received. Also, the track offset update may be compulsorily effected when the update is not effected in a predetermined time. In this case, the system may output a virtual error data. In addition, the track offset update may be effected in response to a temperature change of the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.