SQL-Clustering On Two Esxi host

Dear All,

I have environment with 2 esxi host in a cluster with shared SAN Storage.

I need to do 2 box sql clustering:

one  SQL virtual Machine on 1 esxi host

second virtual machine on esxi host.

Above two virtual Machine i will configure as below:

c: Drive  as a virtual Hard disk

d: Drive as a RDM Mapping.

what i need 2 do to make vmware snapshot possible.I know that snapshot is not possible for RDM Disk but atleast i can take snapshot of C: Drive .

Any one has information?