Longer story: wanted to intialyze my Pegasus2 R4, Raid 5, through Catalinas Disk Utility. But it couldn't be erased because (this was the warning) it couldn't be ejected. So I decided to use Promise Utility, and I somewhat carelessly deleted, er, the logical drive. Which worked, but the Promise disappeared from the Mac. Then I tried to rebuild the array, and I understood that I had to make each Toshiba drive in the physical drive settings Unconfigured.
The buttons Unconfigured as well as Pass Thru are dead. Any tricks? BTW: I updated the FW already.
Thanks in advance.