Read error recovery method and apparatus
US7023645B1 · kind B1 · utility
18Cited by
29References
94Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 5, 2003 |
| Grant date | Apr 4, 2006 |
| Priority date | — |
| Expiry date | Jul 1, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/607
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a method and apparatus for recovering data in a disk drive following a read error. At least a portion of the actuator arm tip is heated. Thermal expansion reduces the read-head-to-disk spacing, increasing the likelihood of success when a re-read of the data is attempted. In one approach, a heater is operatively coupled to the tip. In one aspect, a write head is provided with write current in order to heat the tip. Data which may be modified or overwritten when providing write current to the write head is preferably read and buffered prior to the write operation, for later re-writing to the disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.