Setup Guide

Configuring Storage 49
• Up to 16 SAN-Configured Servers, Single-Path Data, Dual Controllers
(Duplex)
— This configuration contains up to 16 XenServer hosts, each
with one or two NICs for iSCSI connectivity, and an PowerVault MD3000i
storage array enclosure with two RAID controllers. One or two of each
host's NICs are connected to an Ethernet switch, and the Ethernet switch
has one connection to each of the two PowerVault MD3000i RAID
controllers. Two optional PowerVault MD1000 storage enclosures can be
daisy-chained to the PowerVault MD3000i storage array to provide
additional storage capacity.
As shown in Figure 5-16, XenServer hosts connected to the same controller
network port can be part of a single pool. XenServer hosts connected to
Controller 0, Port 0 can be part of one pool and XenServer hosts connected
to Controller 1, Port 0 can be part of another pool. At a given time,
XenServer hosts in a pool can access LUNs controlled by either PowerVault
MD3000i RAID Controller 0 or Controller 1, but not both. Two NICs
(NIC0 and NIC1) on the XenServer host can be bonded to provide high
availability for the iSCSI storage traffic. For more details on how to
configure high availability for IP storage, see "High Availability
Configuration and IP Storage Traffic Segregation" on page 67.