Hybrid-HDD with improved data retention
US9536619B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 2015 |
| Grant date | Jan 3, 2017 |
| Priority date | — |
| Expiry date | May 27, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C29/50004
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Data are refreshed in a nonvolatile solid-state device to significantly reduce the likelihood of data retention errors. Test data are written in a region of the nonvolatile solid-state device when user data are stored in the nonvolatile solid-state device, and are subsequently read to detect the possibility of data retention errors occurring when the associated user data are read. The test data may be a portion of the user data or a predetermined test pattern. To increase sensitivity to incipient charge leakage that may compromise the user data, the test data may be written using a modified write process and/or read with a modified read operation. The nonvolatile solid-state device may be employed as part of a solid-state drive or as the flash-memory portion of a hybrid hard disk drive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.