Building Disaster Recovery Serviceguard Solutions Using Metrocluster with Continuous Access XP P9000 for Linux B.12.00.00

Configuring the command device to manage the remote XP or P9000 arrays
A command device to manage the remote XP or P9000 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 XP or P9000 array to a local device in the local XP or P9000
array using the XP or P9000 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 XP or P9000 array by mapping
a command device in the local XP or P9000 array to a local device in the remote array using
the XP or P9000 external storage feature. Present this remote command device to all
Metrocluster nodes in the remote site. Figure 10 illustrates this configuration.
Figure 10 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 10, 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 31