what is the problems if i used with Microsoft Clustering Services RDM in virtual mode server 2008 R2 SP1
i want to take the advantage of snapshot and clone with esxi 4.1
and there is any prolems in the future with SRM
Welcome to the Community.
You have several limitation in physical RDM (needed for this kind of clustering)... first to all no snapshots.
See also: http://communities.vmware.com/docs/DOC-10055
Andre