Ok... so... tonight my most badass girlfriend actually BOUGHT me another 1 TB drive as a surprise for the Mac Pro!!! God, you gotta love that girl! This replaced the stock 320 Gig drive which I HAD previously been using for Media only (Itunes library and the like) with a 1TB Western Digital Green drive (Best buy w/ coupon for $206). Well, I thought I'd devise a little benchmark to test just how crazy fast the Hitachi 1TB that I use as a boot drive is vs the original drive that Apple shipped (320 Western Digital) and others in my system... So this is what I did. Might be right, might be wrong, don't really care... but I THINK this is a great representative of total, complete "speed and throughput" of a hard drive. I created a folder called "Test Folder" on my Hitachi 1TB (Boot Drive). I added to this folder the following subfolders / files: 1 Folder Entitled "Movies" containing 12 Large Files = 8.5 Gigabytes 1 Folder Entitled "Guns n Roses" containing 67 Medium Files = 455 Megabytes Copied / Added the OS X "Extensions" Folder containing 271 Small Files = 208 Megabytes Copied / Added the OS X "Frameworks" Folder containing 57,263 Tiny Files = 1.49 Gigabytes This gave me a total of 57,617 Files of VARYING Sizes totaling 10.64 Gigabytes. I then proceeded to DUPLICATE this folder on each of my drives... which I believe shows a great overall speed indicator... "read/write/in-cache/out-of-cache/tiny to huge file size" And as it is doing all of the reading / writing on the SAME DRIVE... that eliminates any drive compatibility problems, slow to fast drive copy speed interpretation, bus issues, etc. And here are my results... pretty stunning if you ask me... I think Apple really stuck some DOG SLOW drives in there as stock. I honestly think they should be ashamed of themselves. Time to Duplicate Folder on Stock Hard Drive: (Western Digital 320 Gig WD3200AAJS) = 9 Minutes, 08 Seconds Time to Duplicate Folder on Hitachi 1TB Replacement: (Hitachi HDS721010KLA330) = 5 Minutes, 35 Seconds Time to Duplicate Folder on Western Digital 1TB Drive: (Western Digital WD10EACS-00ZJBO) = 6 Minutes, 20 Seconds Time to Duplicate Folder on Older WD 500GB Drive: (Western Digital 5000AAJS-32YFA0) = 7 Minutes, 18 Seconds Time to Duplicate Folder on Older WD 400GB Drive: (Western Digital D4000KD-00NAB0) = 8 Minutes, 52 Seconds Obviously, the absolute DOG of a drive amongst these was the stock Western Digital 320 Gig drive which couldn't outrun a few older Western Digital drives that were collecting dust in an old PC I had and are a couple years old... Does that make anyone else mad? Well, I'm not too worried about it anyway... I spent ~ $425 for what Apple charges $950 for... upgrading to (2) 1 TB Drives... and I still have the ol' crappy 320 Gigger' for an external Time Machine drive for my baby's Macbook Pro... so I suppose I'm not complaining... it's just... Damn... you know? The fastest machine on the planet ships with an apparently debilitating drive in stock form... Just boggles the mind! Anyway... just thought I'd share my findings! Enjoy.. or flame away... either way, it's all good baby!