Registering Pairs To An Existing Consistency Group; Consistency Group Requirements - Hitachi G200 User Manual

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
¢
¢
¢
3-20
Hitachi TrueCopy® User Guide for Hitachi Virtual Storage Platform Gx00 and Fx00 Models
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
number of pairs supported on page 3-12
consistency groups and the maximum number of TC pairs you can
create.
Planning for TrueCopy
or Maximum
for the maximum number of