Magnetic disk apparatus, recording and accessing method for performing density recording
US5784220A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1997 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | Mar 4, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/10916
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is used a disk medium in which tracks are divided into a plurality of zones in the radial direction and information is read and written with a constant linear density by using a clock signal of a different frequency every zone. A drive unit forms a dead space corresponding to at least one track at a zone boundary of the disk medium and reads or writes the information. In the case where it is judged that the head passes through the zone boundary by the seeking operation to the cylinder address position instructed from an upper apparatus, the cylinder address instructed from the upper apparatus is corrected on the basis of the number of boundary passing times and the seeking operation is performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.