I've just started experimenting with OMV5 and am planning to build my own NAS. I am using an old Dell CPU with 1x 240GB WD SSD connected to onboard SATA port running OMV5 OS. I then installed a PCIe RAID controller and hooked up 2x old SATA HDD (1TB and 500GB) connected to this RAID controller card to see if I can configure then as Mirror RAID. My problem is that I can see these these HDDs under "Disks" but when I go to RAID Management and try to create a "Mirror" configuration by adding both of these drives to it, I get a "Device or resource busy" error. I read in some article that secure wipe usually gets rid of this issue but unfortunately this didn't work for me. Any suggestion on troubleshooting this issue will be appreciated.
Error message when configuring RAID "Mirror" from OMV5 GUI:
Other Debug outputs :