If it is repo, created in SomeDir
by TSVN command "Create repository here" you can copy this Somedir
whole directory into any location and get access to stored data using file:/// protocol (checkout from client, create portable dump with svnadmin).
Repo dir
output
Directory of Z:\repo
30.11.2012 12:02 <DIR> .
30.11.2012 12:02 <DIR> ..
30.11.2012 12:02 <DIR> locks
30.11.2012 12:02 <DIR> hooks
30.11.2012 12:02 <DIR> conf
30.11.2012 12:02 234 README.txt
30.11.2012 12:02 <DIR> db
30.11.2012 12:02 2 format
30.11.2012 12:02 180 467 svn.ico