Disk drive with variable incremented counting of writes to the data tracks for minimizing the effect of far track erasure
US8531793B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2010 |
| Grant date | Sep 10, 2013 |
| Priority date | — |
| Expiry date | Mar 4, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2516
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A hard disk drive (HDD) minimizes the effects of far track erasure (FTE) by counting the number of writes to the data tracks and incrementing counters based on the known effect of FTE on each track. The extent of the FTE effect is determined for each track within a range of tracks of the track being written, and based on the relative FTE effect for all the tracks in the range a count increment (CI) is determined for each track within the range. A counter is maintained for each track. For every writing to a track, a count for each track within a range of the track being written is increased by the CI value associated with the track number within the range. When the count value for a track reaches a predetermined threshold the data is read from that track and rewritten, preferably to the same track.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.