If your ESX host is 3.5 version or even newer you might want to use Veeam B&R with its Quick Migration functionality, available also in a free version of this product.
All you need to do is:
- Install VB&R.
- Add both of your hosts to VB&R console.
- Perform “Quick Migration”.
That’s all.
Should any additional information be needed, don’t hesitate to let me know.
Hope this helps.
Thanks.