I have 2 Western Digital Drives that show up in SoftRaid Lite, but not in macOS Finder.
What OS are you running? you may not be able to remove the driver, depending on what MacOS version you are on.
I Assume the volumes if any, on the disks are not mounting, so what is the error if you erase them with Disk Utility?
I just ran "Initialize…” using Disk Utility (for the second time) from a MacPro5,1 running macOS Sierra 10.12.6 targeting the a Western Digital Drive sitting in a StarTech USB 3.0 to Dual 2.5/3.5" HDD/SSD Docking Station with UASP connected via USB.
Attach a SoftRAID tech support file with the disks connected
What if you "zero disk", 100 sectors? Does that work? It should. then you can use Disk Utility on these drives
Right click or menu: "Disk" > "Zero Sectors" > "First and Last 100 sectors" and then Disk Utility worked as you predicted.
Problem solved.
Thank you.

