Building Disaster Recovery Serviceguard Solutions Using Metrocluster with Continuous Access for P9000 and XP A.11.00

Configuring the command device to manage the remote P9000 or XP arrays
A command device to manage the remote P9000 or XP arrays can be configured using one of
the following methods:
• Configure a command device (remote command device) in a Metrocluster site by mapping a
command device in the remote P9000 or XP array to a local device in the local P9000 or XP
array using the P9000 or XP external storage feature. Present this remote command device
to all Metrocluster nodes in the local site.
Similarly, configure a remote command device for the remote P9000 or XP array by mapping
a command device in the local P9000 or XP array to a local device in the remote array using
the P9000 or XP external storage feature. Present this remote command device to all
Metrocluster nodes in the remote site. Figure 21 illustrates this configuration.
Figure 21 Mapping a command device in the remote XP array to a local device in the local XP
array
Node 1
Array Array
Local Array
Remote Array Raid
CMD
RCMD
R-VOL
Node 2
Local Array
Remote Array Raid
RCMD
CMD
Raid manager
instance
S-VOL
Site A Site B
In Figure 21, the remote command device in the primary XP array is mapped to a command device
in recovery XP array. Similarly, the remote command device in the remote XP array is mapped to
a command device in local XP array. The local array RAID Manager instance at both sites use the
Remote array RAID manager instance 57