Administrator Guide
If the Storage Manager client displays a red mark over the cluster in the Storage Centers view of the cluster, it means that the
Storage Center is reporting that it cannot communicate with the cluster servers over the management network.
• Verify that the network is operational between the cluster servers and the Storage Center by using a network tool such as ping.
• Note that it may take several minutes for the Storage Center to report the cluster status (down or up).
Verify the Data Path is Working
The Storage Centers server view is present if the Storage Center is able to see data connections to the cluster. The HBAs will be
have a red mark if there are problems.
The Fluid Cache Clusters server view will show the HBAs from the Fluid Cache Servers perspective. Depending on the server and its
operating system, conditions such as connectivity may not be visible from this view.
When checking for data connectivity, always check the Storage Centers view rst.
The Cluster in the Fluid Cache Clusters Display is Marked Red
Take the following into consideration when troubleshooting this problem.
• Make sure the cluster is not in Maintenance mode.
• Storage Manager will give the cluster a red mark if it is having trouble communicating with the Fluid Cache servers or if the Fluid
Cache servers report problems back to Storage Manager. The Cache tab for the cluster in the Fluid Cache Clusters display may
have some text to indicate the issue being experienced. Also check the events for clues as to what is causing the issue.
• Expand the tabs for each of the servers, volumes, and storage centers for the cluster in the Fluid Cache Clusters display.
Additional red marks on a server, cache device, volume, or Storage Center may help determine why the cluster has a red mark.
Problems Conguring Server Clusters Dened on a Storage Center with Dell Fluid Cache for
SAN
When a Storage Center is assigned to a Fluid Cache cluster, the Fluid Cache cluster has to follow the same requirements as normal
server clusters dened on the
Storage Center. Servers in the Fluid Cache cluster are automatically mapped to an existing Storage
Center server through their HBAs or created anew if no previous Storage Center server exists.
Since server clusters dened on a Storage Center must have the same operating system, all servers in the Fluid Cache cluster must
also have the same operating system. If a Storage Center server with matching HBAs was previously created on the Storage Center
prior to the assignment and it was dened with a dierent operating system on the Storage Center, than the Fluid Cache cluster will
not be able to assign the Storage Center to the Fluid Cache cluster.
When a Fluid Cache cluster has servers that are part of a Storage Center server cluster, the Storage Center server cluster becomes
a sub-cluster under the Fluid Cache cluster when the Storage Center gets assigned to the Fluid Cache cluster. To maintain cluster
rules, if a server in the Fluid Cache cluster is part of a Storage Center server cluster, than all Fluid Cache servers from the Storage
Center server cluster must be in the Fluid Cache cluster.
Dell Fluid Cache for SAN Cluster Administration
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