HP Matrix Operating Environment Software - Manual (Page 23)

NOTE: A successful activate or deactivate operation ensures that all of the Recovery Groups
within a Recovery Group Set are in the same state (enabled or disabled). However, certain
operations (for example, a Recovery Group edit to change site preference) may result in some
Recovery Groups within a Recovery Group Set being enabled and others being disabled. You
must run an activate or deactivate operation on a Recovery Group Set to ensure that all Recovery
Groups in that Recovery Group Set are in the same state (enabled or disabled).
Unplanned failover
An unplanned failover typically involves the occurrence of a site-wide event, without prior warning.
This event may be a regional disaster (earthquake, massive flood), or a local problem (power loss
or water main leak in the data center).
An unplanned failover includes a series of steps performed at both sites in the Matrix recovery
management configuration. The following procedure assumes that the CMS and managed resources
running DR Protected logical servers survived an unplanned local event (for example, a power
loss). If the event is more severe, resulting in the permanent loss of the CMS or managed resources,
reconstruction of the site may be necessary.
At the site where the site-wide event occurred:
1. Ensure that the DR Protected logical servers are no longer running in order to prevent a
split-brain situation. As long as the DR Protected logical servers have stopped running, Matrix
recovery management will prevent them from automatically powering up when power is
restored.
At the recovery site:
1. Ensure that enough resources are available to run the recovery logical servers.
2. From the Matrix recovery management Sites tab, perform an Activate... operation to activate
DR Protected logical servers at the recovery site.
NOTE: When an Activate... operation is invoked, the status of Recovery Groups that are
being activated will not change on the Matrix recovery management Sites or Jobs screens,
until the Activate... operation has completed. While the Activate... operation is running, there
may be some Recovery Groups that have been activated while others are still in the process
of being activated.
At the site where the site-wide event occurred:
1. After the site where the site-wide event occurred becomes operational following a disaster or
outage, ensure that the storage associated with each Recovery Group Set is the destination
target for Storage Replication (use appropriate storage management tools, for example, HP
P6000 Command View Software).
2. From the Matrix recovery management Sites tab, perform a Deactivate... operation to deactivate
and disable DR Protected logical servers.
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