- All requirements for a consistency group between one primary and one secondary system apply to a consistency group between multiple primary and secondary systems.
- Use storage systems that support consistency groups at both primary and
secondary sites. For details about which storage systems support consistency
groups, contact customer support.
- A consistency group can consist of a maximum of four primary and four secondary (paired) systems.
- The microcode
or firmware
for both primary and secondary systems must support consistency groups between multiple primary and secondary systems. If it does not, pair creation results in failure.
- If a storage system at the primary site does not support the consistency group functionality for multiple primary and secondary storage systems, a pair for a consistency group of one primary and one secondary storage system is created.
- If a storage system at the secondary site does not support the consistency group functionality for multiple primary and secondary storage systems, no pairs can be created.
- You must install the
CCI version that supports a consistency group containing multiple primary systems and secondary systems.
- Cascade configurations with
Universal Replicator pairs are not supported.