The backplane separates the SFF-8654[8X] to two 4X NVMe SFF-8639 receptacle connector. The “Int CNT1/2 NVME Link Width Config” in the RAID adapter is default “Auto” for configuring each receptacle connector 1X link lane. This can be solved to login raid controller web manager console and set “Int CNT1/2 NVME Link Width Config” =4X in the Advanced Configuration.
Tags: ARC-1886