Supporting non-disruptive movement of a logical volume of non-volatile data storage between storage appliances
US10789018B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2018 |
| Grant date | Sep 29, 2020 |
| Priority date | — |
| Expiry date | Apr 23, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0679
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A primary copy and one or more shadow copies of a logical volume are created and discovered by a host rescan performed when the logical volume is initially created. Data storage resources are allocated to the primary copy, but not to the shadow copy. The initial path state of the logical volume describes the path to the primary copy as active, and the path to the shadow copy as unavailable for accessing the logical volume. Movement of the logical volume to the storage appliance providing the shadow copy can be performed without an additional host rescan, by making the shadow copy the new primary copy, making the primary copy a new shadow copy, and updating the path state of the logical volume to indicate i) that the path to the new primary copy is active, and ii) that the path to the new shadow copy is unavailable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.