Storage system with primary and secondary data storage groups and control method thereof
US9563383B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2014 |
| Grant date | Feb 7, 2017 |
| Priority date | — |
| Expiry date | Aug 7, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The primary storage sub system writes a marker that includes the sequence number and that indicates a completion of the data copy into the journal storage area of the first primary group when the data copy from a first primary data volume to a second primary data volume is completed. The primary storage sub system transmits a journal of the first primary group to a first secondary group corresponded to the first primary group and transmits a journal of a second primary group to a second secondary group corresponded to a second primary group. The secondary storage sub system reflects a journal of the first secondary group to a secondary data volume, terminates the reflection based on the marker, switches a volume that makes a volume pair with the secondary data volume from the first primary data volume to the second primary data volume, modifies a belonging of the secondary data volume from the first secondary group to the second secondary group, and reflects a journal in the journal storage area of the second secondary group to the secondary data volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.