Recently I started cluster preparation procedure on two servers based on Windows Server 2012 R2. Before creating cluster I wanted to go through Cluster Validation procedure to see if I prepared everything by the book.
All tests went fine except storage tests. Storage test were entirely cancelled with failed status already at List Disks.
Error was:
Failed to prepare storage for testing on node FQDNoftheserver: The remote procedure call failed.
I went through configuration on both nodes, tested with giving drive letter to boot partitions with no luck, some articles suggested problems with BitLocker and VMware but my installation isn’t based on VMware and also I don’t have BitLocker partitions.
After half an hour I identified the problem. I`m using WD Passport external disks with WD encryption. One such disk was connected to one of nodes I wanted to include in cluster and was locked.
After safely removing encrypted drive I restarted Cluster Validation
Everything passed and I was ready to create cluster.
Simple overlook can make a lot of trouble.