HP XP P9500 Storage - Manual (Page 340)

8 Maintenance and troubleshooting operations
This chapter explains how to perform maintenance on hosts and storage systems and how to take
action if a failure occurs.
Business Continuity Manager allows you to move operations from the primary site to one or more
other sites to continue the operations after the primary site stops due to, for example, disaster or
maintenance work. This processing is called a failover. Conversely, Business Continuity Manager
also allows you to move the operations in one or more other sites back to the primary site after
the primary site has recovered, allowing operations to return to their original state. This processing
is called a failback.
The procedures for failovers and failbacks differ depending on the configuration of the data center.
Failovers and failbacks are not required for some types of maintenance and failures. The following
sections explain the maintenance and troubleshooting operations for each data center configuration.
Using a 2DC Configuration
In a 2DC configuration, you can use the Reverse Resync Function, which reverses the copy direction
of copy pairs, to perform a planned failover and failback. You can therefore use this function to
perform a planned outage of the primary site for maintenance. To perform a failover and failback,
use the following procedure.
1.
Switch from Primary to Secondary sites. (Failover)
2. Perform maintenance at Primary sites while Secondary sites are running.
3. Switch from Secondary to Primary sites.(Failback)
Failover Procedure
The following shows the failover procedure in a 2DC configuration.
340 Maintenance and troubleshooting operations