Hi Rajesh
Regarding SID there are so many threads available in SDN. Please find below one for your reference.
http://scn.sap.com/thread/2025902
http://scn.sap.com/thread/1108649
https://help.sap.com/saphelp_nw04/helpdata/en/80/1a6365e07211d2acb80000e829fbfe/content.htm
Regards
Rajesh SVN