Verifying the SAN configuration
Upgrading in a SAN environment changes which paths are direct. Therefore, before performing an upgrade, you should verify that each host is configured with the correct number of direct and indirect paths, and that each host is connected to the correct LIFs.
On each host, verify that a sufficient number of direct and indirect paths are configured, and that each path is active.
Each host must have a path to each node in the cluster.
Verify that each host is connected to a LIF on each node.
You should record the list of initiators for comparison after the upgrade.
iscsi initiator show -fields igroup,initiator-name,tpgroup
fcp initiator show -fields igroup,wwpn,lif