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Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

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Restrictions: SRDF groups and devices for dynamic add operations

The dynamic modify add operation moves device pairs from the staging area into the SRDF groups of a consistency group.

All devices in the staging area must be in one of the following SRDF pair states for each SRDF group:

  • Synchronized
  • SyncInProg with invalid tracks owed to the R2
  • Suspended
  • Suspended with invalid tracks owed to the R2

If any device pair is Suspended (with or without invalid tracks on any of its SRDF groups), then the device pairs in the same SRDF group must all be Suspended.

The following image shows a staging area for an R1-R2 configuration:

Figure 1. Staging area for adding devices to the R1CG consistency group

RDFG 101 is established between the same array as the RDFG 100 in the R1CG consistency group.

The following image shows the R1CG consistency group after the dynamic add operation:

Figure 2. R1CG consistency group after a dynamic modify add operation

Devices 50 and 51 were moved to R1CG.

The staging area contains the empty RDFG 101.

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