It depends what you want to backup I suppose. Subversion uses a workspace which is just a partial history from the Subversion repository. You can always recreate your workspace from the Subversion repository in the same way you can recreate your git repo using the clone command. If it is your local work you want to backup you need to copy off that workspace (or some call it a working directory) this is the folder you checkout too, this would be like making a backup of your .git clone directory. If it is the server side repo you want to back up you need to backup the repository folder itself wherever it lives. This would be the equivalent to backing your bare .git directory.
you mean using svn can backup both remote and local repo or only remote?
Thanks pbruma...... it's help lot,because im new here. Cheers....:D Alex realpharmacyx