Afternoon, I've done some searching and Google-ing but can't find a definitive answer about whether you can upgrade the HD in a Unibody MacBook with a 7,200rpm disk ? I currently have a 2.4 MBP (Penryn) with the factory fitted 7,200rpm disk and really notice the difference when compared to my Dad's 2.4 Unibody. Being that the stats should be similar (or the Unibody MB quicker with a 1066fsb), I was surprised at the difference on bootup and in iMovie. I previously upgraded the disk in my old white MacBook with a larger 5,400 using the SuperDuper method (Tiger, so before Time Machine restore was available), although noticed a strange issue afterwards. The machine would power on <pause> white screen <pause> Apple Logo <pause> Chimes <pause> Boot... Would I be likely to see this again, or was this a one-off with either my cloned image or the replacement disk ? If this is possible, I'm actually quite tempted to sell my MBP and buy a Unibody MacBook myself. I love the 15" screen on the Pro, but sometimes the appeal of a smaller machine is there Thanks in advance.