Okay, now this is has the potential to get confusing. You're saying "fishbert may be on to something" but then disregard his most recent post, where he categorically explains that the new 1.8 EFI firmware is
not targeted toward the machines affected by this specific issue. If you were able to apply that update, then that means you have a MacBookPro5,1 or MacBookPro5,2 (earlier 15" and 17" models).
Whereas this thread, and the issue discussed here, is about the 13" and 15" MacBook Pros with an SD card slot, that came out in mid-2009, designated as MacBookPro5,3, MacBookPro5,4, and MacBookPro5,5. I have the 15" model of this version, and the 1.8 EFI firmware updater won't run here. It's not for this machine.
Unless all of the models are experiencing the same issue? I don't think that's the case... as many folks have upgraded the SATA II hard drives in those earlier models, without any issue.
That said, even if it's unrelated, it's good data to share, for anyone with a similar issue. Perhaps the cable replacement is something anyone with any model can try, if they're having these frustrating problems with their hard drive upgrade. Until it's categorically fixed by Apple, I know it's something I'll consider if/when I upgrade my MBP again.
I'm still not understanding why my own 500 GB SATA II upgrade is working fine in my own mid-2009 MacBook Pro with SD card slot, without any issues. Perhaps it has something to do with the fact that I moved this hard drive from the previous MacBook Pro generation (where I'd installed it originally as an upgrade, too.) I'm not complaining, mind you, I just find it strange...
Message was edited by: Josh Rafofsky