Owners Manual

Troubleshooting Fluid Cache Installations

If you have issues running Fluid Cache after a successful completion of the installation procedure,

contact your Compellent Copilot.

Troubleshooting the Compellent array and SAN architecture is beyond the scope of this document.

For additional troubleshooting information, refer to the Enterprise Manager Administrator’s Guide and the

documentation for other hardware and software components. See Related Documentation.

After the initial list of Basic Troubleshooting Steps, the troubleshooting topics are presented in the order

in which the issues are likely to appear as you deploy, configure, administer, and maintain a Fluid Cache

installation.

Basic Troubleshooting Steps

Make sure the following conditions are fulfilled:

• You have downloaded and installed the most recent firmware, drivers, and software required to

support Fluid Cache for SAN (see Requirements for Fluid Cache).

• The hardware is racked and cabled according to your hardware documentation.

• The network security settings match those specified in Checking Network Connections.

• The ports available to Fluid Cache match those specified in Connectivity.

• All servers are in the same management interface subnet and in the same cache network subnet.

• Each server in the Fluid Cache cluster appears in Enterprise Manager’s list of servers.

• The avahi-daemon is running (see Checking System Configuration).

• (Optional—for systems with multipath enabled and running) The Fluid Cache devices have been

excluded in the /etc/multipath.conf file on each server in the cluster. See Checking Network

Connections.

Cannot Set up Fluid Cache on a Server

Possible Cause HCN Setup could not set up Fluid Cache on a server because one of the Linux

dependencies is not installed.

Solution Follow the instructions given by RPM, which should state the dependencies that

are missing. Check for the dependencies listed in the Release Notes and compare

them with the list of currently installed dependencies, which you can check by

running this command: rpm -qa

Fluid Cache uses Avahi for autodiscovery between cluster nodes. To check that the

Avahi daemon is running on a node, run the command: ps –ef | grep avahi-

daemon. To start the Avahi daemon, run the command: /etc/init.d/avahi-