On my early 2008 3.2ghz Mac Pro, I found out for the first time, my third and forth hard drive bays are not showing up. Since new I have had two 1TB drives and wanted to add a third.
It should have been a five minute upgrade. However, I never got a drive to show up in the third and forth bays. I was able to format the new drive in the second bay and works fine in the second bay. The known working older drives would not show up in the third or forth bay.
Looking online, I did find that sometimes the logic board connection for the drive bays will come loose. I ended up talking the fan and shield off and made sure the connections were tight. I think I had the right ones! However, I did check all connections but had no luck. I did find lots of dust and I probably needed to clean it out anyway (processors had nice dust bunnies).
I am wondering if they ever worked and maybe something was never connected new? Is there something else to check?
I did try that and took the known good two drives from bays 1 and 2 are not seen in bays 3 and 4. The bus seems to show up in the profile though.
I was able to place the new hard drive in bay two and format it and it seemed to work okay in bay 2. It just seems that bays 3 and 4 and not seeing any drives.
I figured I would just use the drive in my old G4 Security Camera CPU with an SATA card...worked great but for some reason I could not get the new 1TB drive to act as a start up drive whereas a much smaller one would work....
If I cannot get the two bays working, I may just use it as a fresh new drive for the Mac Pro and use the old one in an external case for back-ups. My main purpose of the new drive was to act as a clone back-up in addition to Time Machine back-ups.
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