Virtual MS Cluster Node “Invalid Network Format” Error

mscluster

I came across an interesting scenario recently where a node that is part of a Windows Cluster (hosting a SQL Cluster) on Windows Server 2012 R2 suddenly started reporting errors. The node is part of a 2-node cluster with a 3rd VM acting as a file share witness for the cluster, and had just been moved between vApps in an IaaS / cloud environment to account for a DR provision (where DR is based on vApp membership, not at individual VM level). Once rebooted, the cluster was showing some strange errors, and the cluster name had changed in the Failover Cluster Manager from 'MSCLUSTER.DOMAIN.LOCAL' to 'MSCLUSTER.MSCLUSTER'. On renaming the cluster manually, the ever helpful Microsoft error message (seen in the image attached to this post) … [Read more...]

vSphere ‘Invalid configuration for device ‘0’ error’ Solution

Using vSphere 4 hosts (in this case a legacy un-patched host that was being migrated off and decommissioned), we came across an interesting and ambiguois error - 'Invalid configuration for device '0', plus a note of time, the target object and the vCenter Server. In this case, I was trying to migrate a powered-off VM to different storage - resulting in the error. I also found that the issue was related to the second disk attached to the VM. Editing the VM showed the size as 0MB, but removing this disk also threw the error in vCenter. The solution was to follow these steps: Remove the VM from the vCenter inventory. Update the VM VMX file. There are 2 ways to do this - SSH to the host / datastore using a tool like Putty, or use … [Read more...]