I would be hesitant to do this because, as you stated, NTFS partitions
don't support Unix style permissions.
The Subversion repository directory is usually owned and can only be
written to by the user who runs whatever Subversion server process is
running. For example, if you're using Apache httpd, and you're Apache user
is called httpd, the user who owns the repository is
httpd and this would be the only user with write permissions on
the files and directories.
A NTFS partition on a Windows box does have permissions set correctly
because the Subversion server process would use Windows permission
settings. A Linux server will have problems.
Also NTFS partitions are case preserving and not case
sensitive, I don't know how this would affect the Subversion server
process running on a Linux box. Again, a Windows Subversion server process
would be fine with this. A Linux server may have problems.
Unfortunately, I can't say for certain one way or another. I've never
tried it, nor seen it done. However, there is a post on the Wandisco Forum that covers this very scenario. The user
was able to get around his problems, but I would be hesitant to say that
all is beer and candy from then on.
Please say you're not doing this, so you can share a
file:// protocol Subversion repository among multiple users.
This is a big, fat no-no. Instead, you should at least run the
svnserve process, and have users accessing your repository via
svn:// protocol. It's very simple to setup
svnserve -- even as a Windows service. The only problem may be
that port 3620 (The Subversion server port) is being blocked by your
firewall or router.