Dell EMC AX4-5 Hardware Installation And Troubleshooting Manual page 31

• The shared storage systems and firmware must be identical. Using
dissimilar storage systems and firmware for your shared storage is not
supported.
• MSCS is limited to 22 drive letters. Because drive letters A through D are
reserved for local disks, a maximum of 22 drive letters (E to Z) can be used
for your storage system disks.
• Windows Server 2003 and 2008 support mount points, allowing greater
than 22 drives per cluster.
For more information, see "Assigning Drive Letters and Mount Points"
section of Dell Failover Clusters with Microsoft Windows Server 2003
Installation and Troubleshooting Guide or Dell Failover Clusters with
Microsoft Windows Server 2008 Installation and Troubleshooting Guide on
the Dell Support website at support.dell.com/manuals.
Figure 2-11 provides an example of cabling the cluster nodes to four
Dell/EMC storage systems.
Figure 2-11. PowerEdge Cluster Nodes Cabled to Four Storage Systems
cluster node
Fibre Channel
switch
private network
storage systems (4)
Cabling Your Cluster Hardware
cluster node
Fibre Channel
switch
31