I just purchased 2 M.2 drives hoping to use them as a cache pool. The UEFI menu will show both drives, but the unRAID web GUI will only list one of the drives. Below is a little about my setup.
Motherboard: ASRock X370 Taichi
CPU: Ryzen 5 2600
M.2 drives: 2x XPG SX6000 Lite M.2 2280 512GB PCI-Express 3.0 x4 3D NAND
HBAs: 2x LSI 9207-8i
GPU: ATI FireMV 2250
I tested each drive separately and each will be detected in the web GUI in either M.2 slot when i
UPDATE:
I returned one of the ADATA drives and purchased a HP EX920. Both drives will now show up now.
I was doing testing on my UPS setup to make sure the server will come back on after a power outage. I have a CyberPower CP1500AVRLCD UPS and am using the NUT plugin for communication. I noticed the UPS was turning off before the server would shut down. This was causing a hard shutdown and the ADATA drive would not show up after powering the server back on, not even in BIOS/UEFI