Hi Abhisek
Kindly go thru the below mention links
System copy methohd (OS & DB) http://scn.sap.com/docs/DOC-8343
http://scn.sap.com/docs/DOC-8324
Sap OS/DB Migration Check (For this require Suer id )https://websmp207.sap-ag.de/osdbmigration
Thanks & Regards
Sriram