Servo systems with augmented servo bursts
US8767341B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2013 |
| Grant date | Jul 1, 2014 |
| Priority date | — |
| Expiry date | May 16, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/105
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disk drives are described that include a hybrid servo patterns in which the augmented servo burst fields, which can be Integrated Servo sequences, that provide the PES and also supply additional information such as a SAM, LSBs of the track identifier (TID), sector number, depending on the specific embodiment. Embodiments without write-to-read gaps before the servo sector SIDs are described. The augmented servo burst fields can be read after gapless writing of the preceding data area. For seeking operations the needed bits of the TID without having to detect or decode the Integrated Servo sequences or other augmented servo burst fields. Depending on the embodiment all or the most significant bits of the track identifier can be obtained during seeks by reading the TID fields passing under a read head as the read head moves across tracks without having to detect or decode the Integrated Servo sequences.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.