Troubleshooting - Dell CX4 Series User Manual

Troubleshooting

This appendix 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.
Access Control is not
enabled correctly.
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" on
page 17 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 the following:
• All switched zones are configured
correctly.
• The Access Control software is
enabled on the storage system.
• All LUNs and hosts are assigned to
the proper storage groups.
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).
Troubleshooting
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