HP XP P9500 Storage - Manual (Page 161)

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Perform a scan over a range that contains volumes to be defined in the copy group.
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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 588) .
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 610) .
8. Register a command device for the reverse direction in the storage system of the primary site.
For details on how to register a command device in a storage system, see “Registering a
command device in a storage system” (page 639) ,
9. Perform a remote scan at the storage system of the primary site.
Defining a 3DC Cascade (Cnt Ac-S Z x Cnt Ac-J Z) configuration 161