samba - Nov 2007 - What is the maximum size for a Samba share

Hi,

I have created a Samba share of a ext3 4.5TB filesystem mounted as /backup.
We would like to access this share from some Windows PC's. When we try to
map
to the share using:

    net use s: \\san\backup

we get the following error:

    \\san\backup is not accessible. The network path was not found.

I've created another share called /backup on the os drive with the same
settings,
this works fine, so I don't believe that it is the Samba settings or
permissions.

Is there a maximum size for a Samba share?

Many Thanks

Paul Hobbs