- A pair can be assigned to one consistency group only.
- For the maximum number of consistency groups and
the maximum number of TC
pairs that you can create, see System
requirements and specifications and Maximum number
of pairs supported. Note: If a primary and secondary storage systems are not the same model, the maximum number of pairs in a consistency group and the maximum number of consistency groups is the smaller number of the two.
- Assign a consistency group ID in a range from 00-FF. The ID must be unused.
- When using a volume in a virtual storage machine, if you want to create a consistency group of one primary and one secondary storage system, use volumes in the same virtual storage machine to create a pair. If you register a pair created using different virtual storage machine volumes to a consistency group, the consistency group is regarded as a consistency group of multiple primary and secondary storage systems.