Resize a Volume Participating in Synchronous Replication Verify there is a common snapshot on the upstream and downstream volumes. Edit the volume collection. See Edit a Volume . Delete the downstream volume. See Delete a Volume. Resize the upstream volume. See Edit a Volume. Add the downstream volume. See Create a Volume. Ensure that the same volume size is the same as the upstream volume. Add the upstream and downstream volumes back to the volume collect. See . After adding the volume back to synchronous replication, all the volumes will automatically resynchronize. Enable Peer Persistence to complete the zero recovery point and recovery time objective set-up. See Automatic Switchover (ASO).