HP XP Array Manager Software - Manual (Page 99)

In this example, the secondary volume of Copy Group_A is the primary volume of Copy Group_B
and Copy Group_C .
If a single copy group is connected to multiple copy groups
The secondary volume of the multiple copy groups on the left is the primary volume of the single copy
group on the right.
In this example, the secondary volume of Copy Group_A and Copy Group_B is the primary volume
of Copy Group_C .
If a 3DC multi-target configuration is used
In a 3DC multi-target configuration that uses the delta resync function, the copy group displayed on
the right of the upper line branches to the right, and this copy group is displayed as being connected
to the one on the lower line. In this case, the copy group displayed on the right of the upper line
shares a primary volume with the copy group displayed on the lower line. Additionally, the secondary
volume of the copy group displayed on the left of the upper line is the primary volume of the copy
group displayed on the right of the upper line, and the copy group displayed on the right of the upper
line shares a secondary volume with the copy group displayed on the lower line.
In this example, Copy Group_A and Copy Group_C share a primary volume, the secondary volume
of Copy Group_A is the primary volume of Copy Group_B , and Copy Group_B and Copy
Group_C share a secondary volume.
If a 3DC multi-target configuration further connects to other copy groups
A 3DC multi-target configuration that uses the delta resync function can further connect to other copy
groups that are managed by Business Copy (or Snapshot/Fast Snap). In this case, a volume in the
3DC multi-target configuration is used as the primary volume and the volumes displayed on the right
are used as the secondary volumes. The following three examples illustrate this pattern.
Example (1)
User Guide 99