Setup Guide

Configuring Storage 39
• Redundant Data Paths for Two Single-HBA Host Servers — This
configuration contains two XenServer hosts, each with one SAS 5/E card,
and a PowerVault MD3000 RAID enclosure with two RAID controllers.
The first port of each host's SAS 5/E card is connected to the first PowerVault
MD3000 RAID controller, while the second port of each host's 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 5-9 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 PowerVault MD3000 controller 0
or controller 1. 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 hosts.
Figure 5-9. PowerVault MD3000 RAID Enclosure – Redundant Data Paths for Two
Single-HBA Host Servers
SAS 5/E
Port 1
SAS 5/E
Port 0
SAS 5/E
Port 1
SAS 5/E
Port 0
XenServer Host 1 XenServer Host 2
MD3000
Controller 1
Ports 1 & 0
Controller 0
Ports 1 & 0
PowerVault MD1000
(optional) storage
array
PowerVault MD1000
(optional) storage
array