HP P9000 Continuous Access Journal for Mainframe Systems User Guide (AV400-96397, October 2011)

The next example explains the assignment of the scheduling order of initial copy operations in
cases where initial copy is already performed and two volume pairs are newly added. The P-VOLs
of the data volume pairs to be newly added and the Priority are shown in the following table.
Table 9 Priority set for P-VOLs of data volume pairs to be added
Value set for PriorityP-VOL
2LDEV 10
1LDEV 11
If initial copy is already started and if any initial copy is newly added, the additional initial copy
is started after the previously performed initial copy is completed. The Priority of all the initial copy
operations being performed is shown in the following table.
Table 10 Order of starting initial copy being performed
RemarkValue set for PriorityP-VOLOrder of starting initial copy
Data volume pair for which
initial copy is already
instructed to be performed
1LDEV 021
Data volume pair for which
initial copy is already
instructed to be performed
2LDEV 002
Data volume pair for which
initial copy is already
instructed to be performed
3LDEV 013
Data volume pair for which
initial copy is already
instructed to be performed
4LDEV 034
Data volume pair for which
initial copy is newly
instructed to be performed
1LDEV 115
Data volume pair for which
initial copy is newly
instructed to be performed
2LDEV 106
Priority is determined within the range of the number of initial copy operations performed at the
same time. Therefore, until the first initial copy operations complying with the order of the Priority
are completed, the additional initial copy operations are not started.
Disaster recovery considerations
You define a disaster recovery solution when planning the Continuous Access Journal Z system.
The following are the main tasks for preparing for disaster recovery:
• Identify the data volumes that you wand to back up for disaster recovery.
• Pair the important volumes using Continuous Access Journal Z.
• Establish file and database recovery procedures.
• Install and configure host failover software error reporting communications (ERC) between the
primary and secondary sites.
For more information on host failover error reporting, see the following section. Also, review
“Disaster recovery operations ” (page 103) to become familiar with disaster recovery processes.
Disaster recovery considerations 31