How to password protect a apache alias
Alias /seagate750/ "/mnt/seagate750/" AllowOverride All Options Indexes MultiViews Allow from all
Note, must goto http://server/seagate750/ (Must have that last /)
make /mnt/seagate750/.htaccess
AuthType Basic AuthName "Password" AuthUserFile /mnt/seagate750/.htpasswd require valid-user
make /mnt/seagate750/.htpasswd
mreschke:blahblahblah
Make sure the .ht* files have correct permissions for your apache user. (rwx for user)