may be a dumb question, but would it be smart to partition my second hard drive and install time machine on one of the partitions. each of my 2 hard drives is 750 Gb, and i really dont think ill ever us it all. if this would be ok, then why when i did that it seemed to only let me choose the hard drive that was partitioned to backup with time machine. i startup on my 1st hard drive and use it. if i were to backup a hard drive it would be the one id backup. like i said this might sound like a stupid question. but if im not using the second hard then why not put it to some good use, and avoid buying a external HD. am i missing something here ?