Validate Simultaneous Failover
This test validates that simultaneous disk failovers work correctly in the cluster. Specifically, the test validates that even when multiple disk failovers occur at the same time, any clustered server that takes ownership of a disk can read it. The test also validates that information written to each disk before a failover is still the same after the failover.
Validate test results are HTML-based for easy collection and remote analysis. The time Validate takes to run can be just a few minutes, though this is a function of how many nodes are in the cluster and how many LUNs are exposed to the servers and may take longer as a result. The minimum number of nodes in a given cluster configuration to run Validate is two.
Running Validate is a required part of cluster creation.
Note: When you run Validate, some tests may not pass, but clustering may still install and function. For example, not conforming to a cluster configuration best practice (such as having only one network interface card [NIC] in each node) will raise a warning rather than an error, but the cluster would function. However, passing Validate is the standard for support for clusters in Windows Server 2008: If a cluster does not pass Validate, it is not supported by Microsoft. In addition, running validate does not release the customer from responsibility of using only hardware and software certified under the Windows Server Logo Program for Windows Server 2008.
There should be at least two servers in the cluster before running the Validate Tool. If there is only one server, storage tests that require two servers will not be run and these will be reflected in the report. Validate can also be run after the clusters are created and configured. However, storage tests will not be run on online disk resources.
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