Hi, I have a problem with the following two main symptoms: OS X starts up and the secondary hdd will rumble away non-stop for around 5-15 minutes. When I shut down the imac, it will get stuck on a blue-screen with the rotating thingy This problem began occurring consistently a few days ago. When I shut down, I eventually hold down the power button to turn it off. I have a 27" 2010 imac with a 60GB ssd bootdrive (15GB free atm) and a 1TB secondary hdd. The 1TB hdd is split into an 200GB NTFS bootcamp partition and an 800GB "Mac OS Extended" storage partition. I have recently followed Chysaor's guide to enable NTFS read write access. I have also excluded the NTFS partition from spotlight cataloging. The storage drive is set as my time machine backup, but this problem has been occurring when time machine is not running. I guess I should disable the ntfs read/write access and see if that helps. Is ntfs r/w known to be unstable and casue this problem? (It would be a shame to lose the functionality). Is there another likely cause of my problems? Thanks.