Verifying primary and backup copies of vital information for a processing system employing a pseudo-fixed reference identifier
US6625703B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 2001 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Dec 29, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1666
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Verification of a primary or backup copy of vital information of a processing system employs a pseudo-fixed reference identifier, defined as an identifier unlikely to change over the life of the system, and controls which copy of vital information is correct. The primary copy of vital information is associated with a copy of the pseudo-fixed reference identifier and a backup copy of the vital information is associated with a copy of the pseudo-fixed reference identifier. A processor, when triggered, reads the pseudo-fixed reference identifier, compares it to the stored copies of the identifier of the primary and backup non-volatile storage. (1) If the read pseudo-fixed reference identifier matches the primary copy of the identifier, the processor indicates the vital information is valid. (2) If the read pseudo-fixed reference identifier matches the backup only, indicating that the backup copy of vital information is to be restore copied to become the primary copy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.