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WD 2.5" 750 (& 640) Blue laptop drive help
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Mac Elite
Join Date: Dec 1999
Location: Utah
Status:
Offline
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I posted this also over at the MacRumors forums, but am looking for as much help as I can get so I'm posting it here also...
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....
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Work: 2008 8x3.2 MacPro, 8800GT, 16GB ram, zillions of HDs. (video editing)
Home: 2008 24" 2.8 iMac, 2TB Int, 4GB ram.
Road: 2009 13" 2.26 Macbook Pro, 8GB ram & 640GB WD blue internal
Retired to BOINC only: My trusty never-gonna-die 12" iBook G4 1.25
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Mac Elite
Join Date: Jun 2004
Location: Edmonton, AB
Status:
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Mac Elite
Join Date: Dec 1999
Location: Utah
Status:
Offline
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Originally Posted by macaddict0001 
Sadly that won't help since it's not a Apple drive, it's a WD. (Also it's 5400rpm whereas the firmware update you posted to goes for 7200rpm models)
What finally worked was downgrading the firmware to 1.6 from 1.7. It dropped my friends SATA bus speed from 3 to 1.5, but all the problems we were having went away, and there is only a minimal drop in performance that he won't notice.
Reading this thread helped me solve the issue.
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Work: 2008 8x3.2 MacPro, 8800GT, 16GB ram, zillions of HDs. (video editing)
Home: 2008 24" 2.8 iMac, 2TB Int, 4GB ram.
Road: 2009 13" 2.26 Macbook Pro, 8GB ram & 640GB WD blue internal
Retired to BOINC only: My trusty never-gonna-die 12" iBook G4 1.25
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Posting Junkie
Join Date: Nov 2000
Location: in front of my Mac
Status:
Offline
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Many of these problems have to do with people buying HDDs with built-in shock protection that then conflicts with the Mac's SMS.
Make sure to get a version of the HDD w/o any kind of shock protection.
And if you absolutely have to use a disk with shock protection make sure to turn off the Mac's SMS. Here are Apple's instructions for doing so.
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