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Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

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Transition replication modes

To transition a device or group to asynchronous mode:

  • Create a new device group specifying the mode as asynchronous, or
  • Transition an existing SRDF device or group to asynchronous from another mode.

The time it takes for devices or groups to transition from one mode to asynchronous mode varies depending on the original mode:

  • From synchronous mode:

    If the devices are in a Synchronized state, the R2 devices already have a consistent copy.

    Enabling SRDF/A provides consistent data on the R2 immediately.

  • From adaptive copy disk mode:

    Invalid tracks owed to the R2 are synchronized.

    Enabling SRDF/A provides consistent data on the R2 in two cycles.

  • From adaptive copy write pending mode:

    Write pending slots are merged into the SRDF/A cycles.

    Enabling SRDF/A provides consistent data on the R2 two cycles after there are no more write pending slots.

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