Communication of conditions at a primary storage controller to a host
US8806268B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2011 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | May 8, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A primary storage controller is maintained in a copy relationship with a secondary storage controller, wherein the primary and secondary storage controllers are coupled to a host that is configurable to use the secondary storage controller instead of the primary storage controller. The primary storage controller determines occurrence of at least one condition in the primary storage controller, wherein the at least one condition occurs prior to a failure of the host to perform an Input/Output (I/O) operation with respect to at least one storage volume of the primary storage controller. The primary storage controller communicates the occurrence of the at least one condition to the host, wherein in response to the communicating the host is configured to determine whether to use the secondary storage controller instead of the primary storage controller based on the occurrence of the at least one condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.