Hard drive formatting

[WayneStewart]

I had a couple of 256gb hard drives from water damaged 2013 Macbook Airs. I picked up a couple of PCIe cards to install them in my 3,1 Mac Pro. The cards weren’t supposed to be bootable but I thought 256gb high sped storage for under $10 each isn’t so bad. When I installed the first one it booted right up. I installed 10.6 and 10.11 on the drives. More recently I upgraded to a 5,1 Mac Pro. In the process I installed 10.12 on the drive I had 10.6 on. I didn’t see a problem and just formatted the drive and installed 10.6. Problem, the Mac Pro will no longer cold boot from that drive. I can reboot into it though. Not a huge problem but it does slow down my boot time considerably. Any ideas on how to get back the original drive formatting?

 

[flowrider]

Surprised it boots at all. The earliest 2010 5,1 cMP came with OS 10.6.4. Anything earlier shouldn't boot. The earliest 2012 5,1 cMP came with OS 10.7.3.



Lou

 

[WayneStewart]

Sorry about that, I meant 10.6.8
I tend to not bother with that last digit when talking about OSes.
10.12 should also be 10.12.4