Thank you for sharing. However, I have a PCIe Express 3.0 X1 slot. The one with 4 ports is more than enough for me. But how can I plug it in? And Openmediavault works for sure, right?
Usually those things are for raid. If you are trying to "pass thru" the disks and let something else handle it then you may need to flash into IT mode. Hopefully you bought one that is already in IT mode(if you have other software to do the raid). I don't think OMV will care... it's Debian. As long as the card is recognized as existing on the pci bus... you can make it work. For instance... I have a nvme sata card; doesn't show up in the BIOS at all... but it exists and I'm running omv on it as I write. Personally I prefer SAS, but it is more expensive.