When I do not need to use the thunder bay, I unmount it, wait 30 seconds, but at this point it is still plugged into the Mac (via thunderbolt cable), ...

Well, I'm happy to report that the second time is the charm, all 4 14tb disks finished without error/crashing..... Now on to initialize and creating...

Hi, unfortunately, I did not notice any blinking...... Only after it crashed (for whatever reason) it would not see the drives... so hence why the r...

It did not, because of the error (whatever caused it) softraid no longer had the drives visible on the left side of the screen. Even if I relaunched s...

Well, I talked to a OWC tech support and they looked at the log and said that it failed near the end as I apparently didn't allow full disk access to ...