9.5.01 HP P4000 SAN Solution User Guide (AX696-96168, February 2012)

2. Create management group—plan the managers and virtual manager.
When you create the management group in the two-site scenario, plan to start two managers per
site and add a virtual manager to the management group. You now have five managers for fault
tolerance. See “Managers overview” (page 107).
3. Reorder the storage systems in the cluster alternating by site.
Create the cluster. Reorder the storage systems to the cluster in alternating order by site, as shown
in the bulleted list. The order in which the storage systems are configured in the cluster determines
the order in which copies of data are written to the volume. Alternating the storage systems by site
location ensures that data is written to each site as part of the Network RAID-10 configured when
you create the volume. See “Creating a cluster” (page 133).
Cluster Name—Cluster-1
Ensure that the storage systems are in the cluster in the following order, as shown in Figure 53
(page 129).
• 1st storage system—Boulder-1
• 2nd storage system—Golden-1
• 3rd storage system—Boulder-2
• 4th storage system—Golden-2
CAUTION: If storage systems are listed in the cluster in any order other than alternating order
by site, you will not have a complete copy of data on each site.
Figure 53 Moving storage systems in the cluster to alternating site order
4. Create the volume with Network RAID-10.
Network RAID-10 causes two copies of the data to be written to the volume. Because you added
the storage systems to the cluster in alternating order, a complete copy of the data exists on each
site. See “Planning data protection” (page 142).
Virtual manager 129