Stop external disk from auto-mounting
I partitioned an external disk into three partitions, two of which just hold cloned, bootable backups of Macs before I re-installed them. I only keep these around for emergencies and in case I forgot to copy some data over, but I do not usually use them. In fact, I'd prefer to not mount them to prevent any possible tampering.
The largest part of this disk is set up for Time Machine though, so I keep it connected to my Mac. I only want the Time Machine partition to mount though. Is there a way to mark the two other partitions to not auto-mount every time the Mac starts up?
iMac, Mac OS X (10.6.1)