Hi Neha,
There is an excellent blog about Snapshot in Hana by Lars, here is link below
How to create and recovery a snapshot in HANA, read page numbers from 17-23 in the given below link.
http://www.saphana.com/servlet/JiveServlet/previewBody/4270-102-1-8994/HANA_SPS07_NEW_BACKREC.pdf