HP XP P9500 Storage - Manual (Page 23)

The following are examples of when you can perform At-Time Split based on status of the BC Z
pairs in the consistency group:
•
Example 1
The are six BC Z pairs in a consistency group. 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 At-Time Split, and doing so changes the status of all of the pairs in the consistency
group to “Split/SUSPOP”.
•
Example 2
There are two BC Z pairs in a consistency group 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 At-Time Split.
•
Example 3
The are six BC Z pairs in a consistency group. 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 At-Time Split ends abnormally and the status of all
of the pairs in the consistency group remains the same.
Preparing for Business Continuity Manager, PPRC use
You can use BCM and PPRC to perform the same BC Z pair operations. However, they are
independent functions. Use one or the other.
Command device
Assign a volume as the command device for BCM.
For more information about setting up the command device, see the Business Continuity Manager
User Guide.
On open systems, separate the BCM command device from the command device used by RAID
Manager .
The storage system uses the Missing Interrupt Handler (MIH) values as I/O monitor time for volumes
used as command devices. From the host, set a minimum MIH value of 45 (seconds).
Preparing for Business Continuity Manager, PPRC use 23