What is the largest internal hard drive a Mac Pro 3,1 (early 2008) can support?
I read here that it's around 1.2 TBs is that correct? Also I plan to run Proxmox on it, not Mac OS X (well, I might run it as a VM, but not directly on the bare metal).
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I don't know any upper limit, but after checking more carefully, in mine I have
It appears that there is not necessarily a data limit but a physical limit.
New 6TB+ drives have the screw-holes in a different place & will not physically fit the HD sleds in a 3,1.
So it turns out that the limit is 4TB - the largest with the old screw-placement.
You can get replacement sleds for a 4,1 or 5,1 from OWC, but not for the 3,1
I just added a 6TB drive. I doubt I will ever need to go bigger than that. I see 12TB drives out there, and don't know why they shouldn't work.
Mac OS X supports drive sizes up to ~8 EB (Exabytes).