by PTide » Wed Nov 23, 2016 10:43 am people like this post
The former is not posssible since you cannot take a snapshot of a VM that uses RDM or DirectPath IO. You should place a shared vmdk volume atop of a vmfs filesystem then you can take a snapshot if the VM. Another question - do you plan to utilize multiple ESXi hosts or just one?
by PTide » Wed Nov 23, 2016 2:46 pm people like this post
If I correctly understod what you're trying to achieve then, according to this VMware 5.5 guide, shared vmdk is not an option.You'll need to use either RDM mode (recommended) which does not let you to take snapshots or vRDM mode.