VSWR skip write detector
US6700718B2 · kind B2 · utility
4Cited by
2References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 5, 2001 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Dec 8, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and associated method is disclosed to detect a skip write error occurring during a data storage device write process using a voltage standing wave ratio (“VSWR”), determined by monitoring the voltage reflected by the write element. A change in the read/write head fly height is monitored by comparing the instantaneous voltage standing wave ratio to a baseline voltage standing wave ratio. If the read/write head fly height is determined to be outside of a predetermined range, a skip write error is assumed resulting in a suspension of the write operation and the institution of a rewrite procedure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.