About changing copy pair status – HP XP Array Manager Software User Manual

Page 214

About changing copy pair status

Replication Manager allows you to change the copy pair status in open and mainframe systems. Pair
status change operations may be necessary to resume copy operations after recovery from an error
or unexpected pair status changes.

For open systems, you can perform the split, resync, restore, create and delete operations when the
storage system type is XP12000/XP10000/SVS200 or XP24000/XP20000. You can perform the
split, resync, and restore operations when the storage system is XP12000/XP10000/SVS200,
XP24000/XP20000, or XP1024/XP128.

For mainframe systems, you can perform the delete, split, resync and restore operations when the
storage system type is XP12000/XP10000/SVS200 or XP24000/XP20000. The create operation
is not supported. The above copy pair status change operations can be performed only when HP
StorageWorks P9000 for Business Continuity Manager Software is used. These operations cannot
be performed when P9000 mainframe agent is used.

The pair status conditions where the current pair status can be changed differ depending on the copy
type and the copy pair state when the operation is specified. They also differ depending on whether
the target is a single or multiple copy pairs and whether the target is a copy group. For information,
see the following:

• Pair status transitions (when the target is a single or multiple copy pairs)

, page 219

• Pair status transitions (when the target is a copy group)

, page 215

Precautions

Observe the following precautions when changing the status of copy pairs:

•

While a copy pair configuration definition is being edited, do not use storage system operation
management software, such as Device Manager, P9000 RAID Manager, Remote Web Console,
or HP StorageWorks P9000 for Business Continuity Manager Software, to perform concurrent
operations on a volume, copy group, or copy pair specified in that definition. Doing so may cause
errors when Replication Manager executes tasks.

•

If you have executed an operation that reverses the primary-secondary relationship of volumes,
recreate the Change Copy Pair Status task. If the copy direction is reversed, the copy pair after
the reversal is no longer recognized as being the same as the copy pair before the reversal so if
a Change Copy Pair Status task created for the copy pair before the reversal is executed, the task
execution will fail.

•

Daylight savings time involves adjusting the system time of the Replication Manager management
server for certain time periods. Operations scheduled for these time periods are handled in the
following manner:
• On the day that daylight savings time starts, a task scheduled for the skipped time period (for

example, from 2:00 to 2:59) is executed one hour later. For example, a task scheduled for
2:30AM on that day is executed at 3:30AM.

• When daylight savings time ends, an overlapping time period occurs and a task scheduled

for that time is executed once. For example, if a task is scheduled for 1:30AM, the task is only
executed for the first instance of 1:30AM and not the second (when the time change occurs).

For best results, do not use the Change Pair Status Wizard or Edit Task dialog box to schedule a
task that will be executed when the system time will be adjusted for daylight savings time.