HP XP P9500 Storage - Manual (Page 179)

4. From the local host, register a command device for the storage system of the local site, primary
site, and remote site, in that order.
For details on how to register a command device in a storage system, see “Registering a
command device in a storage system” (page 568)
Settings for Operations at the Remote Site (3DC Multi-Target Configuration)
To set operations at the remote site:
Defining a 3DC Multi-Target (Cnt Ac-S Z x Cnt Ac-J Z) configuration 179