Dual sector servo system for disk file with separate read and write heads
US5073833A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1989 |
| Grant date | Dec 17, 1991 |
| Priority date | — |
| Expiry date | Nov 13, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59633
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and servo system is provided to compensate for misalignment of separate read and write heads when reading and writing data on a magnetic disk. Two sets of servo information are generated for each data track on the disk. These sets are radially displaced with respect to each other by a distance equal to the respective misalignments between the read and write heads at each respective data track. One set is generated by the write head. The other set is generated by the write head while the read head is positioned using said one set as a position reference. Thereafter, to write data on a selected track, the read head is first aligned with said one set of servo information and then data is written on said track with the write head. To read data on a selected track, the read head is aligned to said other set of servo information and then the data is read by said read head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.