

This process should replicate the exact configuration that your iMac server used onto the MacMini.

Boot the iMac up from the Mac OS X Server DVD.

To restore the iMac drive onto the MacMini: Note: restoring via Disk Utility may require you to choose to erase the MacMini server's startup disk for it to be able to perform a block copy (which is the fastest restore option). However, this will retain all permissions, settings, trusted bindings, license, and other requirements from your previous install. Performing a restore (block copy) of the data from one drive to another will require you to boot from another disk (the 10.6 server DVD?) to perform the copy. This can be accomplished by using the Disk Utility restore function. If you can afford the downtime, you will retain the most information and likely accomplish the fastest copy by performing a "Restore" of the current server's drive onto the MacMini server's drive (this should work just fine being that both machines are currently running the same OS version).
