HP P9000 Replication Manager Software 7.2.0-01 Release Notes (TB584-96048, February 2012)

Important considerations
Replacing secondary volumes of Continuous Access Synchronous or Continuous Access
Journal in a 3DC multi-target configuration (open systems)
To replace all the secondary volumes included in a Continuous Access Synchronous or P9000/XP
Continuous Access Journal copy pair, launch the Pair Configuration Wizard more than once to replace
the secondary volumes according to the following procedure.
1. Generate and execute the replacement tasks to replace half of the secondary volumes of the
Continuous Access Synchronous or P9000/XP Continuous Access Journal copy pair.
2. Generate and execute the replacement tasks for the other half of the secondary volumes not
replaced in step 1.
If you use Pair Configuration Wizard only once to generate and execute the replacement tasks for all
of the secondary volumes in the Continuous Access Synchronous or P9000/XP Continuous Access
Journal copy pair, task execution might not be successful.
Adjusting the task execution schedule for daylight saving time
When all of the following conditions are met, either or both of the following behaviors might occur
and task execution does not start as scheduled:
Behaviors
1. A task is executed one more time than scheduled before the hour lost (02:00-02:59) when switching
from standard time to daylight saving time.
2. After daylight saving time is applied, the second execution starts an hour later than scheduled.
Subsequent executions start as scheduled.
Conditions
1. You are using Replication Manager in a region where daylight saving time is applied.
2. A Change Copy Pair task is scheduled to execute during the hour that is lost when switching from
standard time to daylight saving time.
3. The following conditions are met when the task is scheduled:
• The task is scheduled to execute for a time during the hour lost (02:00-02:59) when switching
from standard time to daylight saving time and was executed for the first time at least one
day before the day the clocks were moved forward. For example, when daylight saving time
starts and a task that is scheduled to execute every 8 hours was previously executed at 18:00
on the day before daylight saving time starts (the condition for generating behavior 1).
• You have specified an execution interval of longer than 24 hours. In other words, you have
scheduled a task that will be executed for the second time on the day after daylight saving
time starts (the condition for generating behavior 2).
Temporary solution
Do not schedule a change pair status task during the hour lost when changing from standard time to
daylight saving time. Schedule the task for a time after 02:59.
Executing scheduled tasks
When a task scheduled for execution meets all of the following conditions, the next scheduled execution
of the task is automatically adjusted to start later.
4 Important considerations