Initial Setup in Cluster Installation for RDM
The following table lists issues you could encounter during initial setup in a cluster installation with raw device mapping (RDM):
Issue |
Resolution |
---|---|
In ISO installation, I/O error on shared LUN. |
Click Ignore and normal installation proceeds. |
High Availability or other RDM-related feature is not ready. |
Make sure that multipath is not enabled. |
Cannot convert standalone mode to HA cluster. |
Check if you have multipath enabled. If yes, contact Cisco Technical Assistance Center to disable multipath. |
Validations on Node A |
|
No shared storage devices detected during first node installation. |
Check if the RDM and shared disk have been added with required configuration. See Installation and Upgrade Guide, specific to the Cisco UCS Central release version you are using. |
Failed to write on disk. |
|
Validations on Node B |
|
Peer node unreachable. |
Verify the following:
|
Expected shared storage device not found. |
Make sure that you configure the same shared storage device (same LUN) for both nodes. |
Node cannot be added to the cluster. |
Verify the following:
|
You have enabled multipath while setting up HA. |
Contact Cisco Technical Assistance Center. |