DKCE Now Fully Supports Windows Server 2008 R2 SP1

Microsoft has identified a workaround to address the issue described in this post.  Details below:

Changes were made in SP1 to support symmetric storage; however, these changes actually make deploying multisite clusters more complicated in some circumstances. If you are using SP1 and want to add a node to a multisite cluster that is using a 3rd party storage class resource like DataKeeper, the only way to add a node without causing the cluster disks resources to be added back into the cluster (which really causes a mess to clean up) is to use PowerShell to add the node as described here:http://technet.microsoft.com/en-us/library/ee461047.aspx