Windows failover cluster with two quorum disk witnesses

I have seen this also in the past when I deployed a failover cluster. One time I fixed it by executing the following PowerShell command: Remove-ClusterNode After that I executed the following command to clear the configuration on the node: Clear-ClusterNode You have to start the Windows Powershell Modules from the Administrative Tools otherwise these commands won't work. After that I was able to succesful join it to the cluster

If these commands don't work, I'm afraid you have to reinstall the operating system on each node of the cluster.

The space actually used by a quorum disk amounts at most to a few kilobytes, not even megabytes. There is really no reason at all to go above the suggested size.

That said, creating a LUN and a NTFS volume of a few megabytes in size would be impractical for several reasons; the most common size for quorum disks in my experience is 1 GB, and even that is 99% wasted space.