Setup Guide

40 Configuring Storage
• Redundant Data Paths for Two Dual-HBA Host Servers — This
configuration contains two XenServer hosts, each with two SAS 5/E cards,
and an MD3000 enclosure with two RAID controllers. The first SAS 5/E
card of each host is connected to the first MD3000 RAID controller,
while the second SAS 5/E card of each host is connected to the second
MD3000 RAID controller. Two optional MD1000 enclosures can be daisy
chained to the MD3000 to provide additional storage capacity.
See Figure 5-10 for an illustration of this configuration.
In this configuration, XenServer 1 and XenServer 2 can be part of a single
pool, sharing LUNs controlled by either MD3000 RAID controller 0 or
controller 1. If a path between the host and MD3000 fails, the LUNs will
failover to the other controller, thus maintaining storage access to the
XenServer hosts.
Figure 5-10. PowerVault MD3000 RAID Enclosure – Redundant Data Paths for Two
Dual-HBA Host Servers
SAS 5/E SAS 5/E SAS 5/E SAS 5/E
XenServer Host 1 XenServer Host 2
MD3000
Controller 1
Ports 1 and 0
Controller 0
Ports 1 and 0
PowerVault MD1000
(optional) storage
array
PowerVault MD1000
(optional) storage
array