Performing mirroring of a logical storage unit
US9471449B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 3, 2008 |
| Grant date | Oct 18, 2016 |
| Priority date | — |
| Expiry date | Feb 17, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2064
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Mirroring of a logical storage unit initially associated with a first controller is performed, where the first log segment associated with the first controller is maintained of writes by the first controller to the logical storage unit. The first log segment is for use in mirroring writes to a mirror system. Control of the logical storage unit is transferred from the first controller to at least a second controller, and in response to the transfer, a first marker is provided in the first log segment to enable the mirror system to synchronize mirrored writes corresponding to writes to the logical storage units by the first controller and at least a second controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.