Chosen Solution
I’ve got three HDs on my Mac Pro 8 core, two are SATA drives with two different bootable OS installed. The third drive is an SSD( my main drive ). On random boot ups, the computer often stalls. if I pull the SSD, I can get it to boot. After several boot ups, I’ll plug in the SSD and it’ll boot up just fine. The SSD is a fairly new OWC 6G. That drive has all my authorizations and after it’s able to boot up, it works flawlessly. I’ve re installed the OS ( Mountain Lion ) a few times already. Short of sending this back to OWC for testing, I wonder if anyone else has had this experience.
Try swapping the bay (slot number) of the SSD for a few days to a week. Go back into System Preferecnes:Startup Disk to select it after you make the change. You might need a new RRAM battery… I think that might be why it randomly “forgets” which is the boot drive-that is if it’s not a bay/connector issue. If this Answer is helpful please remember to return and mark it Accepted.
I would run Disk Utilities on this drive before returning. Since the machine will not boot with the SSD installed and the drives are not hot swappable, I would boot the machine from the highest system you have installed on your hard drives. Then attach the SSD via USB using a n external carrier or a Universal Adapter and see if the drive can be repaired. [linked product missing or disabled: IF107-108-1]
