Tip: After removing existing TC pairs, perform the procedure above in When
creating a new TC pair.
Registering pairs to an existing consistency group
This topic describes how to register TC pairs in a consistency group of
multiple primary and secondary storage systems to an existing consistency
group.
When creating a new TC pair
1. Add information of a TC pair you want to add to CCI configuration
definition file B to create CCI configuration definition file C.
2. In CCI, create a TC pair using CCI configuration definition file C.
When using existing TC pairs
1. To use existing TC pairs from CCI, create CCI configuration definition file
A.
2. In CCI, split pairs using CCI configuration definition file A.
3. In CCI, resume pair operation using CCI configuration definition file A
without specifying a consistency group.
4. In CCI, split pairs using CCI configuration definition file A.
5. Use CCI configuration definition file B to split pairs in the existing
configuration of multiple primary and secondary storage systems.
6. Add information of the TC pair you want to add to CCI configuration
definition file B for the existing configuration of multiple primary and
secondary storage systems to create CCI configuration definition file C.
7. In CCI, create a TC pair using CCI configuration definition file C.
Tip: After deleting existing TC pairs, you can perform the procedure in When
creating a new TC pair.
Consistency group requirements
Requirements are provided for the following consistency group (CTG)
configurations:
• Requirements for a CTG for one primary and one secondary
system
¢
A TC pair cannot be assigned to more than one consistency group.
¢
Assign an unused consistency group ID to a consistency group to be
registered.
¢
See
System requirements and specifications on page 2-2 or Maximum
number of pairs supported on page 3-12 for the maximum number of
consistency groups and the maximum number of TC pairs you can
create.
3-20
Planning for TrueCopy
Hitachi TrueCopy® User Guide for Hitachi Virtual Storage Platform Gx00 and Fx00 Models
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