Method and apparatus for controlling motion of storage media
US7813069B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2008 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | Mar 5, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/4671
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of controlling relative motion of a data storage medium on which data is stored in data groups comprising tracks extending across the storage medium and a rotatable transducer for reading data from the storage medium includes determining from the data groups a start reread data group at which a data reread process is to start following detection of a read error condition in a preceding data read process. The method also includes obtaining a reread track reference value for use in controlling that relative motion during the data reread process using a track reference value difference stored in at least one track of at least one data group that is to be reread during the data reread process and a track reference value that was used in controlling that relative rotation during the preceding data read process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.