Non-disruptive storage volume migration between storage controllers
US11461031B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2021 |
| Grant date | Oct 4, 2022 |
| Priority date | — |
| Expiry date | Jun 22, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4022
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A migration replication relationship for data migration between a migration-source volume on a first storage controller and a migration-target volume on a second storage controller, a volume represents a virtualized device. The method presents the migration-source volume and the migration-target volume as a same volume to a host whilst using differentiated target port descriptors to define different discoverable paths to the each. During data migration, the method allows input/output operations to the migration-source volume by presenting target ports of the first storage controller in an available state and deters input/output operations to the migration-target volume by presenting target ports on the second storage controller in a standby state whilst allowing host discovery of paths to the migration-target volume. Once the data migration is complete, the method switches target port states to allow input/output operations to the migration-target volume and to deter input/output operations to the migration-source volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.