I took the plunge and bought a new 1.5 TB drive for my early 2008 iMac. It's from the Seagate series that was so notorious for firmware issues, but that was some time ago and I'm confident that the problems have been ironed out. If not, well, I always maintain a backup and intend to make good on my warranty. Even though I'm not terrified for the integrity of my data, I am still cautious. I will of course continue to maintain a full backup of my important files, although as my next-largest drive is a 250 GB external that might be difficult. More to the point of the question, I want to know from the start if the drive has any sort of defects that I should be concerned about: bad sectors, SMART issues, whatever. I have a 2.5" SATA enclosure and 3.5" ATA enclosure. I don't have anything to plug my old drive into. Maybe I should've picked up another enclosure, but it was pricey enough already. So as far as I know the only way to connect my drive is to put it into the computer. No problem, I can just boot to an external. Coming to the point of the post, what (preferably free) tests can I run on the drive to really put it through its paces? Mac utilities would be preferable, but I do have Windows and Ubuntu installs that could be used in a pinch. It doesn't matter if it takes a few days to test, I just want to know with a reasonable certainty that it is a reliable, undamaged drive before the return period ends.