Data recovery apparatus, method and memory medium for a magnetic memory read/write channel
US6501611B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 27, 1999 |
| Grant date | Dec 31, 2002 |
| Priority date | — |
| Expiry date | Apr 27, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/183
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data recovery method for a read assembly of a magnetic memory device. The magnetic memory device has a moving magnetic medium, such as a disk, and a transducer spaced from the disk by a normal gap distance. The read assembly includes a variable gain amplifier and a control computer that controls the read and write operations of the magnetic memory device. The data recovery method uses the control computer to adjust the gain of the amplifier when an error is detected in a read signal. The method tests to see if the error is due to a variance from the normal gap distance by the head that is caused by either an thermal asperity of the disk surface or by a change in temperature of the moving magnetic medium. If a variance is found, the amplifier gain is adjusted and the data is reread. If there is no error the data is provided to an output interface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.