I have an Areca 1882 connected to a PCIe 16x slot on an ASUS server board. I have attached two of the mini-SAS cables in the back of the card to an internal-external mini-SAS adapter card, then ran those two external SAS cables to an 8-bay drive enclosure with 8 4TB 3.5" mechanical drives.
The Areca shows 5 of the drives being occupied by disks -- slots 1, 5, 6, 7, and 8. I have moved the drives around and no matter what, these slots only show up as occupied. I have moved around cables, re-seated everything, etc.
Any idea what troubleshooting I can do to find out why slots 2-4 do not seem to see disks?