In fact, additional tests are executed once the cluster is in use which check that best practices are being followed for the highly-available workloads.
There are Across these dozens of tests, only a few of them will impact running cluster workloads and these are all within the storage category, so skipping this entire category is an easy way to avoid disruptive tests.
Listing All Disks and Potential Cluster Disks will not impact anything.
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As you may already know, the requirements for having a supported cluster have been significantly simplified since the release of Windows Server 2008.