Setup Guide

Configuring Storage 41
• Redundant Data Paths for Dual-HBA Host Server, Two SAS Links —
This configuration contains one XenServer host with two SAS 5/E cards
and a PowerVault MD3000 RAID enclosure with two RAID controllers.
One port of the first SAS 5/E card is connected to the first MD3000 RAID
controller, while one port of the second SAS 5/E card is connected to the
second PowerVault MD3000 RAID controller. Two optional PowerVault
MD1000 storage enclosures can be daisy-chained to the PowerVault
MD3000 RAID enclosure to provide additional storage capacity.
See Figure 5-11 for an illustration of this configuration.
If a path between the host and PowerVault MD3000 RAID enclosure fails,
the LUNs failover to the other controller, thus maintaining storage access
to the XenServer host.
Figure 5-11. PowerVault MD3000 RAID Enclosure – Redundant Data Paths for
Dual-HBA Host Server, Two SAS Links
SAS 5/E
XenServer Host 1
Controller 1 Controller 0
PowerVault MD1000
(optional) storage
array
PowerVault MD1000
(optional) storage
array
PowerVault MD3000