HP XP Racks - Manual (Page 163)

For details on how to register a command device in a storage system, see “Registering a
command device in a storage system” (page 634) .
6. Perform a remote scan at the storage systems of the intermediate site.
•
Perform a scan over a range that contains volumes to be defined in the copy group.
•
A DAD ID that is to be assigned to the intermediate site by performing a remote scan
must be the same DAD ID assigned by a scan from the primary site.
For details on how to perform scans to acquire storage system information, see “Acquiring
volume information” (page 583) .
7. Establish an inter-CU logical path (Intermediate
→ Primary).
To see the procedure for loading and building a logical path, see “Establishing a logical path”
(page 605) .
8. Register a command device for the reverse direction in the storage system of the primary site.
Defining a 3DC Cascade (Cnt Ac-S Z x Cnt Ac-J Z) configuration 163