Methods for adaptive throttling of data refresh operations and disk drives implementing the same
US8531791B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2012 |
| Grant date | Sep 10, 2013 |
| Priority date | — |
| Expiry date | Mar 14, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2516
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of refreshing data on a hard disk drive configured to carry out commands issued by a host that comprises tracking run-time conditions related to patterns of host command activity on the hard disk drive; selecting an entry from a high priority pool that is configured to hold a predetermined maximum number of entries, each entry comprising a plurality of tracks having been designated as being eligible for a high priority refresh operation as a result of the host command activity; refreshing data stored on at least one track of the selected entry; pausing the refreshing for a period of time equal to a throttle interval to process at least one command issued by the host before returning to the selecting or to the refreshing, and periodically modifying a value of the throttle interval depending upon the tracked run-time conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.