Magnetic read/write of reference track in contact start-stop testing of magnetic disks
US6157189A · kind A · utility
4Cited by
7References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1998 |
| Grant date | Dec 5, 2000 |
| Priority date | — |
| Expiry date | Mar 23, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for testing a magnetic disk and a read head are provided. A reference track is written on the magnetic disk. The read head is scanned laterally with respect to the reference track while the magnetic disk is rotating. The reference track is sensed with the read head as the read head is scanned across the reference track to produce a scanned read signal that is representative of disk and read head performance. The scanned read signal may be processed to provide parameters such as track average amplitude, signal-to-noise ratio, and pulse width of write transitions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.