Adaptive configuration of thermal asperity guard bands
US10388314B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2018 |
| Grant date | Aug 20, 2019 |
| Priority date | — |
| Expiry date | Apr 12, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/6076
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus and method for reducing the effects of thermal asperities on a rotatable data recording surface. A data transducer writes user data to a first set of tracks at a first fly height above the recording surface. A compensation circuit detects a thermal asperity (TA) on the recording surface, and establishes a guard band as a second set of tracks that are co-radial with the TA. The second set of tracks are deallocated and removed from service. The compensation circuit further defines a reserve band as a third set of tracks immediately adjacent the guard band, and selects an increased, second fly height that allows the data transducer to write data to the reserve band without contacting the TA. The second set of tracks may have a greater track pitch than the first set of tracks to compensate for the greater fly height.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.