Designing Disaster Recovery Clusters using Metroclusters and Continentalclusters, Reprinted October 2011 (5900-1881)

command devices. The remote array RAID Manager instance at both sites use the remote command
devices.
• Configure a dedicated command device in the P9000 or XP array at the remote site that is
directly presented to the nodes in the local site over an extended SAN without using the P9000
or XP external storage feature. Similarly, configure a command device in the remote site P9000
or XP array and present it to the nodes of the local site over an extended SAN. Figure 33
illustrates this configuration.
Figure 33 Configuring the command device over an extended SAN
In Figure 33 (page 173), a dedicated command device in the XP array is presented to all nodes of
the remote site. The local array RAID Manager instance at both sites use its own command devices.
The remote array RAID Manager instance at each site uses the command device presented to it
from the remote XP array using extended SAN.
Configuring a remote array RAID Manager instance
A RAID Manager instance for a remote array must be created on all nodes of each site. This RAID
Manager instance uses the command device that is configured to obtain the Continuous Access
device group status from the remote P9000 or XP array.
Complete the following steps to configure a RAID Manager instance for the remote array:
Preparing the Cluster for Data Replication 173