HP XP7 Storage - Manual (Page 23)

Figure 10 RAID Manager instance configuration & components
The four possible RAID Manager instance configurations are:
•
One host connected to one storage system. Connecting one host to one storage system allows
you to maintain multiple copies of your data for testing purposes or as an offline backup. Each
RAID Manager instance has its own operation manager, server software, and scripts and
commands, and each RAID Manager instance communicates independently with the command
device. The RAID storage system contains the command device that communicates with the
RAID Manager instances as well as the primary and secondary volumes of both RAID Manager
instances.
•
One host connected to two storage systems. Connecting the host to two storage systems enables
you to migrate data or implement disaster recovery by maintaining duplicate sets of data in
two different storage systems. You can implement disaster recovery solutions by placing the
storage systems in different geographic areas. Each RAID Manager instance has its own
operation manager, server software, and scripts and commands, and each RAID Manager
instance communicates independently with the command device. Each RAID storage system
has a command device that communicates with each RAID Manager instance independently.
Each storage system contains the primary volumes of its connected RAID Manager instance
and the secondary volumes of the other RAID Manager instance (located on the same host in
this case).
•
Two hosts connected to one storage system. Having two attached hosts to one storage system,
one host for the primary volume and the other host for the secondary volume, allows you to
maintain and administer the primary volumes while the secondary volumes can be taken offline
for testing. The RAID Manager instances of separate hosts are connected via the LAN so that
they can maintain awareness of each other. The RAID storage system contains the command
RAID Manager instance components on the host server 23