Setup Guide

42 Configuring Storage
• Redundant Data Paths for Dual HBA Host Server, Four 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 port of the
PowerVault MD3000 RAID controller 0, and the other port of the first SAS
5/E card is connected to the first port of the PowerVault MD3000 RAID
controller 1. One port of the second SAS 5/E card is connected to the
second port of the second PowerVault MD3000 RAID controller 0, and the
other port of the second SAS 5/E card is connected to the second 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 5-12 for an illustration of this configuration.
If a path between the host and MD3000 fails, the LUNs will failover to another
available path, thus maintaining storage access to the XenServer host.
Figure 5-12. PowerVa ult MD3000 RAID Enclosure – Redundant Data Paths for Dual
HBA Host Server, Four SAS Links
SAS 5/E SAS 5/E
XenServer Host
MD3000
Controller 1
Ports 1 & 0
Controller 0
Ports 1 & 0
PowerVault
MD1000 (optional)
storage array
PowerVault
MD1000 (optional)
storage array