HP 3PAR Operating System Software - Manual (Page 274)

added to existing asynchronous periodic groups their first sync occurs the next time the entire
group synchronizes.
•
You must enter this command on the backup system before entering it on the primary if the
mirror_config
policy is not set.
•
When a secondary group says that it is in the started state, it does not necessarily mean that
the group is receiving data from the primary system. The primary group might be stopped, or
its system might even be down. The fact that the group is started only indicates that the group
is ready to receive writes from the primary group. To determine if writes to the volumes of the
primary group are being mirrored to the secondary group, the status of the primary group
must be examined.
274 The Remote Copy Commands