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

Troubleshooting

This section provides troubleshooting information for your cluster
configuration.
Table A-1 describes general cluster problems you may encounter and the
probable causes and solutions for each problem.
Table A-1. General Cluster Troubleshooting
Problem
The nodes cannot
access the storage
system, or the cluster
software is not
functioning with the
storage system.
Probable Cause
The storage system is
not cabled properly to
the nodes or the
cabling between the
storage components is
incorrect.
The length of the
interface cables
exceeds the maximum
allowable length.
One of the cables is
faulty.
Switching zone is not
configured correctly.
LUNs are not assigned
to the hosts.
The cluster is in a
SAN, and one or more
zones are not
configured correctly.
Corrective Action
Ensure that the cables are
connected properly from the
node to the storage system. See
"Cabling Your Cluster for Public
and Private Networks" for
more information.
Ensure that the fibre optic
cables do not exceed 300 m
(multimode) or 10 km (single
mode switch-to-switch
connections only).
Replace the faulty cable.
Verify that all switched zones are
configured correctly.
Verify that all LUNs are assigned
to the hosts.
Verify the following:
• Each zone contains only one
initiator (Fibre Channel
daughter card).
• Each zone contains the
correct initiator and the
correct storage port(s).
Appendix:Troubleshooting
47