Have an external partition be unmounted by default: How?

[thequicksilver]

I've recently purchased a 250GB drive to backup my iBook and as extra storage. I've split it into two - one partition of 55.76 GB, the exact size of my iBook's hard drive, this will be where my weekly backup will go. The other 177 GB is for storage.

However, 99% of the time, I don't want access to my backup partition, and it's just in the way on the desktop. But, whenever I plug the drive in, both partitions show up by default, and if I want to remove one and not the other from the desktop, the only way I've found is via Disk Utility.

So, I'd like to have it so my backup partition:

• Does not show up on the desktop when the drive is plugged in.
• Remains easily mountable/unmountable via Disk Utility.
• Remains bootable in case of disaster.

Is what I'm asking for possible? If so, advice would be appreciated.

 

[jdechko]

I'm not entirely sure if this would work, but maybe an automator script could unmount the backup drive. You could have a one-click solution whenever you mounted the drive.