How about svnsync? The nice thing about svnsync is that you don't need direct access to the filesystem the repository is on--it works over the svn client interface.

svnsync would synchronize the whole repository to the target location. That is OK if you want to keep a copy elsewhere. One of the solutions that I provided allows you to dump each version in turn which svnsync does not do.

Having written that, svnsync would definitely be another option to consider.

Thank you for the reminder!

Good discussion of the options.

I'm a big fan of the simplicity and usability of the hot-backup.py script that the subversion team provide