Do not destory that 30Gb old OSX

I was always tempted to get rid of the 30Gb old school OSX 10.5 on my MacMini, until I found out that when something goes wrong on my system, that old school OSX 10.5 partition on my MacMini Internal harddisk is the ONLY parition that I can bring up.  And from there I can springboard to other places, like the OSX Lion or the OSX Mountain Lion preview OS.

So yeah, no matter how tempted it is, note to self, NEVER delete that parition.

Oh and another note-to-self: stop dreaming about running more than one OS partiion on the MacMini.  You can only do one and that's it.