i'm running two host esxi 6.7 and i have two vm which is install MS failover Cluster and DB cluster with RDM disk attach as shared storage.
and i have a problem is that i'm not able take snapshot of that vm which in cluster.
is there any other way to create cluster and after that can i take snapshot ?
No, you will not be able to snapshot a VM which has pRDMs attached as this is by design. That's one of the things you give up when you decide to do physical-mode clustering. You will have to use some in-guest based backup method instead.