Backup system that takes a snapshot of the locations in a mass storage device that has been identified for updating prior to updating
US5835953A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 8, 1996 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Nov 8, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/82
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for maintaining logically consistent backups using minimal data transfer are presented. A system comprises a backup system having a backup storage device and one or more primary systems having mass storage devices that are to be backed up on the backup storage device. The primary systems identify changes that are going to be made to the mass storage device. The combined effected locations in the mass storage device of these identified changes are then captured in a static snapshot when the mass storage device is in a logically consistent state. Only those data blocks changed since the last backup are then transferred to backup system. The backup system can then store these changes or apply the changes to the backup storage device in order to bring the backup storage device current to a particular point in time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.