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Concepts

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  • How synchronous mirroring works
    Synchronous mirroring is the replication of data volumes onto separate storage arrays in real time to ensure continuous availability. The purpose is to achieve a recovery point objective (RPO) of zero lost data by having a copy of important data available if a disaster happens on one of the two storage arrays.
  • Synchronous mirroring terminology
    Learn how the synchronous mirroring terms apply to your storage array.
  • Workflow for mirroring a volume synchronously
    In ThinkSystem System Manager , you can mirror a volume synchronously by following these steps.
  • Synchronous mirroring activation
    The Synchronous Mirroring feature is automatically activated when the first synchronous mirrored pair is created on a storage array.
  • Requirements for using synchronous mirroring
    If you use the Synchronous Mirroring feature, keep the following requirements in mind.
  • Synchronous mirroring status
    A synchronous mirrored pair's status indicates whether the data on the primary volume and on the secondary volume is synchronized. A mirror status is independent of the component status of the volumes in the mirrored pair.
  • Volume ownership
    You can change the preferred controller owner in a mirrored pair.
  • Role change between volumes in a mirrored pair
    You can change the role between volumes in a mirrored pair. You can do this by demoting the primary volume to the secondary role or promoting the secondary volume to the primary role.