Operating System Software Owner manual

Figure 2 Example bidirectional 1-to-1 Remote Copy
N-to-1 Configuration
An N-to-1 Remote Copy configuration is composed of multiple Remote Copy pairs. A maximum
of four primary storage systems use the same backup storage system.
NOTE: Because the backup system participates in one Remote Copy pair for each primary system,
the backup system must have four or more controller nodes.
You can set up N-to-1 Remote Copy configurations in either of the following arrangements:
• One bidirectional Remote Copy pair and multiple unidirectional pairs (one, two, or three
unidirectional Remote Copy pairs, depending on the number of primary systems)
• All unidirectional configurations (one, two, three, or four unidirectional Remote Copy pairs,
depending on the number of primary systems)
NOTE: In an N-to-1 Remote Copy configuration, only one link can be bidirectional.
Figure 3 (page 16) illustrates an example N-to-1 configuration in which:
• Bidirectional Remote Copy is maintained between Remote Copy pair System3 and System4.
• Unidirectional Remote Copy is maintained between Remote Copy pairs System1 and System4
and Remote Copy pairs System2 and System4.
N-to-1 Configuration 15