Measuring amplitudes of written tracks in a tape drive to determine errors in read and write elements in the tape drive
US11404078B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2021 |
| Grant date | Aug 2, 2022 |
| Priority date | — |
| Expiry date | Aug 12, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10314
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided are a tape drive, tape drive controller, and method for measuring amplitudes of written tracks to determine errors in read and write elements. The write element writes a data pattern and erase pattern to the tape medium to provide the data pattern and the erase pattern on sides of the data pattern. The read element is positioned to measure amplitudes at offsets in the data pattern. The offsets and the amplitudes at the offsets are processed to estimate a maximum amplitude read while the read element is estimated to be positioned entirely in the data pattern and estimate an offset at which the read element reads a fixed percentage of the maximum amplitude. A width of the read element is estimated based on the estimated offset. The estimated width of the read element is outputted to determine whether the estimated width of the read element is acceptable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.