Dell AX4-5 - Manual (Page 12)

12
Introduction
Cluster Storage
While configuring your Dell Failover Cluster with Windows Server 2008,
attach all cluster nodes to a common shared storage. The type of storage array
and topology in which the array is deployed can influence the design of your
cluster. For example, a direct-attached SAS storage array may offer support for
two cluster nodes whereas a SAN-attached Fibre Channel or iSCSI array has
the ability to support sixteen cluster nodes.
A shared storage array enables data for clustered applications and services to
be stored in a common location that is accessible by each cluster node.
Although only one node can access or control a given disk volume at a point
in time, the shared storage array enables other nodes to gain control of these
volumes in the event that a node failure occurs. This also helps facilitate the
ability of other cluster resources, which may depend upon the disk volume,
to failover to the remaining nodes.
Additionally, it is recommended that you attach each node to the shared storage
array using redundant paths. Providing multiple connections (or paths) between
the node and the storage array reduces the number of single points of failure that
could otherwise impact the availability of the clustered applications or services.
For details and recommendations related to deploying a Dell Failover Cluster
solution with a storage array, see the "Cabling Your Cluster Hardware" section
in the Dell Failover Cluster Hardware Installation and Troubleshooting Guide
for the specific storage array on the Dell Support website at support.dell.com.
Other Documents You May Need
CAUTION:
The safety information that is shipped with your system provides
important safety and regulatory information. Warranty information may be
included within this document or as a separate document.
NOTE:
To configure Dell blade server modules in a Dell PowerEdge cluster, see the
Using Dell Blade Servers in a Dell PowerEdge High Availability Cluster document
located on the Dell Support website at support.dell.com.
• The Dell Windows Server Failover Cluster Hardware Installation and
Troubleshooting Guide provides information on specific configuration
tasks that enable you to deploy the shared storage for your cluster.
• The Dell Cluster Configuration Support Matrices list the Dell validated
hardware, firmware, and software components for a Failover Cluster
environment.