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# Swap SRDF personalities

Symmetrix Remote Data Facility (SRDF) facilitates the data replication from one storage system to another through a storage area network or Internet Protocol (IP) network.

This procedure explains how to swap the SRDF volume designations for a specified device group. It changes source (R1) volumes to target (R2) volumes and target (R2) volumes to source (R1) volumes.

Half swapping SRDF personalities swap one side of the SRDF device designations for a specified group. It changes source (R1) volumes to target (R2) volumes or target (R2) volumes to a source (R1) volumes.

## Prerequisites

See Roles and associated permissions to determine the user roles that can perform this task.

This operation is blocked on SRDF groups that Global Mirror uses.

## About this task

This operation can be invoked from multiple locations in the Unisphere user interface (Device group > SRDF Group, Device Group > SRDF Pairs, SG All Details > SRDF tab, PROTECTION dashboard) . Depending on where the operation is invoked, some of the steps below may not apply.

To swap SRDF personalities:

## Steps

1. Select the storage system.
2. Click PROTECTION to view the PROTECTION dashboard and select SRDF from the Protected Storage Groups section of the summary panel.
3. Select a group, click , and select Swap.
   For storage groups with Celerra FBA emulation, a warning dialog is displayed indicating that the storage group may be managed externally using eNAS. To continue, click OK, otherwise click CANCEL.
4. Select the Use 2nd Hop option if including the second hop of a cascaded SRDF configuration.
5. For optional Refresh R1 or R2 volumes, select R1, R2 or None.
6. For optional half swapping, select Half Swap.

   When the SRDF device pairs of an SRDF/Metro configuration are Not Ready (NR) on the link, and the SRDF pair state is Partitioned, a half swap operation is allowed. If the half swap is issued to the R2, the SRDF link to the R1 must be unavailable.

   If the half swap is issued to the R1, the SRDF link to the other side must be available and the SRDF pair must be seen as R1 – R1 (duplicate pair).

7. Click Advanced Options to set the advanced options. Select the advanced options and click OK.
8. Do one of the following:
   - Click Run Now to perform the operation now.
   - Expand Run Now and click Add to Job List to add this task to the job list, from which you can schedule or run the task at your convenience. For more information, see Schedule jobs and Preview jobs.