So I have some weird issues....
I have a unibody 13" Macbook Pro, 2.26 (MacBookPro5,5) with 4GB of RAM, currently with a internal WDC WD6400BEVT-22A0RT0. (the 640GB WD Blue). More on this machine in a sec....
I'm installing a WD 7500BPVT-00HXZT0 (WD 750 Blue) into a friends 15" Macbook Pro, 2.53 (MacBookPro5,4) Unibody, also with 4GB of ram.
The 750 installed into the 15" and installed 10.6 off the factory discs. Everything went ok, but for some strange reason it would "hang" for a few moments (spinning beachball) and then kick back in fine while doing ordinary tasks. It doesn't sound like a head parking issue.... The drive is very quiet.
Long story short, I swapped the 750 into my 13" and put my 640 into the 15" to see if that changed anything, and sure enough, the 750 ran like a champ in my 13", but my 640, now transplanted into the 15" had the exact same behavior. My 640 was running just fine in my 13" before. I swapped them back and now everything is normal again with my 640 in the 13" and the sluggish behavior returns to the 750 in the 15". I installed SL onto an old apple 160GB drive I had (the original 13" HD) and put it into the 15" and it works fine, normal, no hangs. I even put the 750 into a external FW 800 case and booted the 15" off it, and then it works fine! No slowdown or hangs at all....
What is it about the internal bay on the 15" that doesn't like WD blue drives? Since both my 640 and the 750 exhibit the same behavior in that machine, but work fine in my 13" (and works fine on the 15" when in a FW case)....
Any idea's?
Thanks in advance....