Mac OS X Server 10.2 allows multiple network disk images to be used with NetBoot client computers. The network images can be used to start up clients in both Mac OS X and Mac OS 9, or to install software as Network Installation volumes. If multiple images exist on a Mac OS X Server 10.2 computer, each can be enabled or disabled, or be set up as a default image for NetBoot clients. You can find these settings by clicking the Image tab in the DHCP/NetBoot configuration window.
If a NetBoot server has only one image, this image becomes the default image for NetBoot clients regardless of the default checkbox selection made. This behavior has implications in a scenario in which the only image on the server is a Network Installation image. If you use a Network Installation image to start up and install software on your client systems, you should also disable the image after the installation has taken place in order to avoid unauthorized installation of software on your client computers.
If you want to reset the default image selection for all NetBoot clients, you should remove the bsdpd_clients listing file from /var/db, followed by restarting server. Then, hold "N" key while starting up each client computer. The user will be forced to the proper default image. Clients will now be bound to the new image by default.
Note: Changing the NetBoot/Network Installation image settings may require restarting the server computer.