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Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

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Set SRDF mode: adaptive copy disk

Adaptive copy disk (acp_disk) mode is designed to transfer large amounts of data without loss of performance.

Because the array cannot fully guard against data loss should a failure occur, Dell EMC recommends:

  1. Use the adaptive copy disk mode to transfer the bulk of your data to target (R2) devices.
  2. Then switch to synchronous mode to ensure full data protection.

When you set the SRDF mode to adaptive copy disk, the array acknowledges all writes to source (R1) devices as if they were local devices. New data accumulates on the source (R1) device and is marked by the source (R1) side as invalid tracks until it is subsequently transferred to the target (R2) device. The remote director transfers each write to the target (R2) device whenever link paths become available.

Examples

To set the replication mode in group prod to adaptive copy disk:

symrdf -g prod set mode acp_disk

To disable adaptive copy disk mode and set the replication mode in group prod to synchronous:

symrdf -g prod set mode acp_off

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