I am currently building an AI Unraid server with some server-grade hardware. The Case has a 12 bay storage bay in the front, 3 seperate backplanes for each row (3 x 4). Problem now is that they dont show up entirely, i even can't find controller information in the Bios. They got power (orange LED) when i boot, but nothing else happens. Motherboard has 2 x SlimSAS und 4 x SATA connectors. 2 of the 3 backplanes are connected via SAS cables and the 3th with a SAS to 4xSATA cable. Don't know if it's a motherboard problem or if all(?) 3 backplanes are bad. Bios is the newest from ASUS.
Hardware:
Case: SilverStone SST-RM61-312 Rack
MB: ASUS Pro WS WRX90E-Sage SE
CPU: AMD Ryzen Threadripper Pro 7975WX
GPU: 2x nVidia RTX 6000 Ada
RAM: 8x Kingston RAM Kingston D5 5600 96GB C46 ECC