Dynamic track pitch in shingled magnetic recording hard disk drive
US12347455B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2023 |
| Grant date | Jul 1, 2025 |
| Priority date | — |
| Expiry date | Dec 4, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/1238
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Controlling a shingled magnetic recording (SMR) hard drive involves writing, to a first track of a zone pre-sized based on a nominal track width based on an expected mean track width across an entire zone, a portion of a write operation according to the nominal track width. Then, based on the positional accuracy of the first track writing, determining a second track position for an adjacent second track, and writing the second track another portion of the write operation according to the determined second track position. Thus, the determination and position of a given track is determined by the positional accuracy of a previously written track, considering for example the position error signal corresponding to the writing of the previously written track. Thus, the track pitch is effectively defined by the average positional error across a zone rather than by a worst-case scenario positional error across the zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.