HP XP Racks - Manual (Page 23)

The following are examples of when you can perform a CG pair-split based on status of the BC Z
pairs in the CG:
•
Example 1
The are six BC Z pairs in a CG. Two of the pairs are paired (“DUPLEX” status), two are in
“PENDING” status, and two are in “Split/SUSPOP” status. In this case, you can perform a
CG pair-split, and doing so changes the status of all of the pairs in the CG to “Split/SUSPOP”.
•
Example 2
There are two BC Z pairs in a CG and one is paired (“DUPLEX” status) and the other is in the
process of being resynchronized (“Resync/PENDING” status). In this case, you cannot perform
a CG pair-split.
•
Example 3
The are six BC Z pairs in a CG. Two of the pairs are paired (“DUPLEX” status), two are in the
process of Quick Split (“V-Split/SUSPVS” status), and two are in “Suspend/SUSPER” status.
In this case, the CG pair-split ends abnormally and the status of all of the pairs in the CG
remains the same.
Using ATTIME Suspend to split CG pairs at a specific time
With ATTIME Suspend, you can define a specific time to simultaneously split all the pairs in a
consistency group and copy data from the P-VOLs to the S-VOLs.
The following image illustrates the use of ATTIME Suspend.
Business Continuity Manager and IBM PPRC preparation
You can use BCM or IBM PPRC to perform the BC Z pair tasks. IBM PPRC and BCM are independent
functions; you must use one or the other.
Related topics
For more information about:
•
The system requirements for BCM and IBM PPRC, see “Business Copy Z system requirements”
(page 11) .
•
BCM, see the Business Continuity Manager User Guide.
Business Continuity Manager and IBM PPRC preparation 23