2015 iMac 27" retina and 2016 MacbookPro. One G-RAID and one Mercury pro elite dual, 2-bay external drives with internal hardware RAID. One of them mounted once, the other not at all on TB2 (iMac) or TB3 with Apple adapter. At one point, I wish I remember how (yes, don't think it), I used a G-Tech program to make that drive a mirror. I've tried multiple cables on every port on each of these Macs. As others have noted in other threads, they will mount successfully in USB.
I am running 11.1. I've seen threads from late last year about problems, but I saw no solutions and they were different versions of Big Sur. I hope I haven't committed a faux pas by posting a new thread.
Has anyone found a solution? Do the drives need to be formatted a certain way in USB? I could really use some help with this one of several Big Sur problems. Thank you.
I am running 11.1. I've seen threads from late last year about problems, but I saw no solutions and they were different versions of Big Sur. I hope I haven't committed a faux pas by posting a new thread.
Has anyone found a solution? Do the drives need to be formatted a certain way in USB? I could really use some help with this one of several Big Sur problems. Thank you.