SoftRaid & Big Sur - Drive Not Mounting Fix

Posting this here in case anyone else has an issue with a raid not mounting in BigSur. You can run this in a terminal:
sudo kmutil load -p /Library/Extensions/SoftRAID.kext

More info here:


thanks for sharing this.

I had a very similar issue last week which seemed to be fixed by removing and reinstalling the ATTO drivers for SAS card (also connecting on the thunderbolt bus).

I bet this was my actual issue all along.