Subversion Problem: Can't get exclusive lock on file

Very new to the version control process and Subversion and having a
recurring problem. I can find references to this problem in various
lists but no solution that I can wrap my head around.

Running two mac platforms - MacBook Plus (10.4.11) and iMac (10.4.11). I
have svn installed on both machines and can create and populate
repositories on either machine on local drive. When I mount the iMac
from the MacBook I can create a repository on the mounted drive:

svnadmin create /Volumes/Macintosh\
HD/Users/user/Development/svn/new_sams - Works

However, when I try to import into the repository I get an error.

svn import /Library/WebServer/Documents/temp/ file:///Volumes/Macintosh\
HD/Users/user/Development/svn/new_sams/ -m "install"

svn: Can't get exclusive lock on file '/Volumes/Macintosh
HD/Users/user/Development/svn/new_sams/db/transactions/0-1.txn/rev-lock':
Operation not supported

-- 
Doug Martin, Ph.D.
Manager - Instructional Design Group
Adjunct Associate Professor of Audiology
University of Cincinnati 
513-556-6689
doug.martin_at_uc.edu
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