Using this option, you can add additional volumes to an RDS even when replication is in progress. This command associates a volume to all the RVGs of the RDS. Note that the Add Volume wizard provides you with the option to create volumes on the Secondary host, corresponding to those on the Primary, if they are not already created. However, you can also choose to create the volumes on the Secondary hosts beforehand and then use this wizard to add the volumes to the RDS.
The options available on this wizard vary depending on whether you have created the volumes on the required hosts.