Redundant data storage and data recovery system
US6763436B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2002 |
| Grant date | Jul 13, 2004 |
| Priority date | — |
| Expiry date | Aug 4, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2064
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data replication system is disclosed in which replication functionalities between a host computer, an interconnecting computer network, and a plurality of storage devices are separated into host elements and a plurality of storage elements. The host computer is connected to one or more host elements. The host element is responsible for replicating data between the storage devices, which are each connected to an associated storage element, and for maintaining data consistency. Further, the host element instructs a storage element whose associated storage device does not contain up-to-date data to recover from another one of the plurality of storage elements and its associated storage device. The storage elements and their associated storage devices may be located in any combination of diverse or same geographical sites in a manner to ensure sufficient replication in the event of a site or equipment failure. The storage elements are responsible for executing read and write requests received from the host computer and for maintaining data consistency. When a storage element and its associated storage device is determined not to contain up-to-date data, recovery is effected by data t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.