Ouch?!? 12 HD's making 200GB... Surely shome mishtake? Sounds like you're running out of Swapfile space to me... ... unless you've LOADS of memory, your swap-file is the place to look for this problem. If your PSU fails or your CPU is overheating, you will have re-starts. (Black-screen restarts). Delete loads of shite to make extra space on your 12 drives... or invest on a couple of nice new 120GB drives! Depending on your windows version, you're probably better off with several larger drives than 12 small ones. Howard:)