what is backup?
How many types we can take back up?
What is offline backup?
How to take offline backup and restore?
Refer this site : Backup and Restore
i already have refer this link. Need to have more information
What exactly are you looking for? Can you be bit more specific, so that we can offer you some help.
The document specified by Onkar covers
I have already studied this link but it is not specific define that how to implement offline backup with steps like online backup steps are mentioned.