I installed a WD Scorpio Blue Hard Drive in my 2.53GHz Core 2 Duo machine running 8 GB of memory and am really regretting it. Ever since the HD upgrade, my computer has been a big pain. The drive seems like it's constantly putting itself to sleep and then having a hard time waking up, or it feels like it's running at full steam all the time. I get several seconds of beach balls for practically every command in any program. I have to constantly hard reboot to stop some of the beach balls and other wacky behavior. It's slow, sluggish, and calling up any file causes my HD to start whirring up and then after up to two-three minutes of beach ball, my file might open. It might very well crash upon opening too. I've heard that Snow Leopard doesn't know how to deal with new, low power HD's. I don't want to dump a bunch of stuff and put back my old factory HD back in, but I'm getting to the end of my rope with this. My mac is performing like a ten year old Windows machine. Is there any way to fix this? Is there any update to SL or firmware for new HD's available to remedy this problem?