I used to have a setup with 2 harddrives, the bigger one being my master and the slave with only data, not even an OS. I took one of the harddrives off because I thought it was the culprit for my PC overheating/hardlocking, but I found it wasn't the only cause, at least. I have these 2 HD's Seagate U6 80GB Hard Drive (Ultra ATA/100, 5,400 RPM, 2MB - MPN: ST380020A) Western Digital 250GB EIDE Internal Hard Drive 7200 RPM, 8 MB buffer, 40-pin EIDE I have just recently learned and can vouch for the fact that the WD drives certainly do tend to be unreliable. That one recently just crapped out on me, painfully losing 200gb worth of all sorts of cool stuff, so I'm going to reformat it for sure. What I'm debating now is whether I should reformat my main one, the 80 gb, and start brand new, which is most likely what I'll do. My questions are, which drive would suit better as the master drive? Is RPM the only thing that matters? Of course I'm looking to pick the drive which will have faster processing times than the other. Also, is it recommended (better) for only the master drive to have an OS installed? That's how my setup was and it worked just fine, files from the slave drive worked perfectly fine so I was comfortable with that. Lastly, after all these years, I'm going to learn from my mistake and really devote at least a portion of the drive for backup. My original drive, which came with the PC, had about 2 gigs stored for recovery, and about 6 years ago when I bought it, I deleted it. What would you recommend for me to have (whether it be software, or simply a method of backing data up every once in a while) in case one of my drives were to just take a shit? Reformatting wouldn't really be a problem, but I would hate to lose my files again. Yes long post, I know, but I'll appreciate any advice you guys got to offer, thx.