http://blogs.technet.com/timmcmic/archive/2009/06/09/windows-2008-exchange-2007-single-copy-clusters-scc-disk-is-alive-checking.aspxIf you are using a Windows 2008 / Exchange 2007 Single Copy Cluster (SCC) you should read my co-workers blog post regarding disk resource is-alive checking. http://blogs.technet.com/brian_kern/archive/2009/06/04/windows-2008-and-the-isalive-sanity-check.aspxen-USCommunityServer 2.1 SP1 (Build: 61025.2)