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Deployment Guide 17
Cabling the Cluster in Redundant Configuration With Single SAS 5/E HBAs
Each cluster node attaches to the storage system using one SAS 5/E HBA and two SAS cables. In this
configuration, there are redundant storage paths from the cluster node to the storage system. If a
component fails in the storage path such as the port, the cable, or the storage controller, the multi-path
software automatically reroutes the I/O requests to the alternate path so that the storage array continues
to operate without interruption.
To cable the cluster:
1
Connect cluster node 1 to the storage system.
a
Install a SAS cable from the cluster node 1 HBA port 0 to the RAID controller module 0 port In 0.
b
Install a SAS cable from the cluster node 1 HBA port 1 to the RAID controller module 1 port In 0.
2
Connect cluster node 2 to the storage system.
a
Install a SAS cable from the cluster node 2 HBA port 0 to the RAID controller module 0 port In 0.
b
Install a SAS cable from the cluster node 2 HBA port 1 to the RAID controller module 1 port In 0.
NOTE: If the HBA on the primary server fails, MSCS moves the cluster group to the other server and accesses the
data through the other server.
Figure 1-3. Redundant Cluster Configuration With Single SAS 5/E HBA