Method of duplicating data on a magnetic disk with reduced duplication time
US5402270A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1994 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Aug 26, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1217
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for duplicating data on a rotating magnetic disk in sectors on concentric tracks so that the sectors are aligned with each other from track to track and referenced to an index mark. The index mark is sensed as the disk rotates. The time elapsed between sensed index marks is counted to define the angular displacement of the disk. A magnetic head is moved successively to the tracks on the disk. Data to be duplicated is recorded in sequence, sector by sector, on the respective tracks beginning at different offsets from the index mark such that recording begins with the next sector encountered after the head arrives at the respective tracks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.