HP StorageWorks XP Remote Web Console Software - Manual (Page 110)

NOTE: Journal groups of LDKCs other than LDKC00 cannot be registered in the extended
consistency groups when the supervisor DKC is an XP12000/XP10000 Disk Array, even
if the number of LDKCs is expanded in a future version.
Figure 47 Example Configuration Where an XP24000/XP20000 Disk Array Can and
Cannot be Specified as the Supervisor DKC
110 Preparing for Universal Replicator for Mainframe Operations