Administrator Guide

Solution To check device function, select the device in Enterprise Manager and in the Event tab,
look for a device failure message. Replace the cache device if necessary, using
instructions in the Dell Compellent Enterprise Manager User’s Guide.
Cache Device Cannot Be Added to a
Cluster
Possible Cause The cache device is not functioning properly. Under some conditions, the process of
adding a device completes normally even though the device being added is not
functioning properly.
Solution
To check device function, select the device in Enterprise Manager and in the Event tab,
look for a device failure message.
If necessary, replace the cache device by following the instructions provided in the Dell
Compellent Enterprise Manager User’s Guide.
Cannot Select a Specific Cache Mode
Possible Cause There is an existing cache mode configured for the volume mapping. The cache mode
chosen for a volume mapping cannot be changed. The existing mapping must be
deleted, and a new mapping created. A new cache mode can be selected while
creating the new mapping.
Solution Remove the volume mapping and create a new mapping. When you create the new
mapping, you can then select a different cache mode (“cache policy”). See
Removing Volume Mappings and Mapping Volumes.
Possible Cause The cluster is in maintenance mode.
Solution Take the Fluid Cache cluster out of maintenance mode by selecting the cluster in
Enterprise Manager, clicking Edit Settings in the Summary tab, and clearing the
Maintenance Mode option. Note that certain system failures or an invalid license may
prevent the cluster from being taken out of maintenance mode. Refer to the Enterprise
Manager Status and Events tabs, and see Fluid Cache License Is Expired.
Troubleshooting Fluid Cache Installations 43