TOPIC:

I have a Existing server Dell R720 with XenServer 6.2 (Primary). I have additional server with same spec and model. Now i want to make high availability redundancy for my two Host server without deleting or transfer my VM from my original server or Primary. Theirs a way can make this happen?

Please help and any suggestion..

You have a couple choices. If you have a spare drive on your existing machine, move your VMs there, then add HA-Lizard using the other storage. If you want to use all of your existing local storage for HA-L then you're going to have to temporarily move your VMs somewhere else for the install. You can temporarily set up a store on a NAS or other shared server space. I've done it like that a couple of times using other storage on my network with no VM downtime. Worst case scenario, export the VMs, install HA-L, then import them again. But you're going to have down time with that method.