Storage system with cascaded copy targeting and enhanced integrity
US7509523B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2006 |
| Grant date | Mar 24, 2009 |
| Priority date | — |
| Expiry date | Jun 4, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0673
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A storage controller includes an interface to host computer apparatus and an interface to a plurality of controlled storage apparatus. The storage controller comprises a host write component operable to send a request to write a data object to a source data image at one of said plurality of controlled storage apparatus; a copy component operable in response to a metadata state to control copying of said data object to a target data image in a delimited sequence of data images in a cascade at said plurality of controlled storage apparatus and a fill-in component operable in response to detection of an offline condition of a disk containing said target data image to control substitution of a fill-in disk in place of said disk containing said target data image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.