HP XP P9500 Software User's Manual page 175

Figure 80 Copy Pair Status Transitions for Delta Resync Pairs
NOTE: Note the following when operating a delta resync configuration:
For the conditions in which a pair status changes from the HOLD status to the HOLDTRNS
status (and vice versa), see
Set Up or Operated Successfully" (page
Status transition from the HOLD status to the HOLDTRNS status (and vice versa) is performed
asynchronously to user operations.
In the 3DC Multi-Target configuration that includes delta resync pairs, certain copy pair operations
for a copy group automatically change the copy pair statuses of other copy pairs to other statuses.
Table 46 (page 176)lists the operations that affect other copy groups.
"Actions to be Taken When the Delta Resync Function Cannot be
340).
Defining a Delta Resync Configuration 175