Setup Guide

Configuring Storage 37
• Redundant Data Paths for Single-HBA Host Server — This configuration
contains one XenServer host with one SAS 5/E card and one PowerVault
MD3000 RAID enclosure with two RAID controllers. One port of the SAS
5/E card is connected to the first port of the PowerVault MD3000 RAID
controller 0, while the second port of the SAS 5/E card is connected to the
first port of the PowerVault MD3000 RAID controller 1. Two optional
PowerVault MD1000 storage enclosures can be daisy-chained to the
PowerVault MD3000 RAID enclosure to provide additional storage
capacity. See Figure 5-7 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 5-7. PowerVault MD3000 RAID Enclosure – Redundant Data Paths for Single-
HBA Host Server
Controller 1
Port 0
XenServer host
PowerVault MD3000 storage array
SAS 5/E
Port 1
SAS 5/E
Port 0
Controller 0
Port 0
PowerVault MD1000
(optional) storage
array
PowerVault MD1000
(optional) storage
array