Method and apparatus for storing position offset information on a hard drive assembly cylinder
USRE40955E1 · kind E1 · reissue
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2001 |
| Grant date | Nov 10, 2009 |
| Priority date | — |
| Expiry date | Jan 18, 2021 |
Classification
- Technology area (CPC —)General
Abstract
A method and apparatus for storing position offset information not used for aligning the read element of an MR head with the centerline of written data, during a read operation. The skew or offset between the read and the write elements on a read head is first calibrated. The offset information then stored on one or more dedicated tracks of the disk. To accomplish this, the write element is aligned with the centerline of the dedicated track. The position offset information is then written in the data field of the dedicated track. During the power-on process, the read element is aligned with the centerline of the dedicated track and the position offset information may be retrieved by simply reading the information previously stored on the dedicated track.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.