INS-40601
The Intelligent Platform Management Interface (IPMI) driver is not installed on one or more of the following nodes: string.
Cause
Intelligent Platform Management Interface (IPMI) drivers were not installed on all the nodes that you indicated should be part of the cluster. Cluster Synchronization Service (CSS) requires this driver, as it interacts with the IPMI driver to ensure cluster integrity.
Action
Download the IPMI driver from the hardware vendor website, and ensure that the driver is installed and configured on all the nodes, so that installation can continue.