hello
I managed to bring down my subversion remote server (temporarily). However, I have a file backup with subversion root.
is it possible to temporarily update working copy from this backup root, while maintaining/(or reverting) original repository location?
First off, it's best (if you're copying from a live server) to use svnadmin hotcopy instead of a plain fil copy; this ensures that things get read in an order that avoids race conditions if someone commits during the copy. But if you copied from a server that nobody was using at the time a file copy is fine.
To change what server a working copy pulls from, use svn switch --relocate [URL] to change how it accesses the repository. Then, when your server is back, just use it again to change back.