root=/dev/md0 intel_iommu=igfx_off netif_num=2 HddEnableDynamicPower=1 syno_hw_version=DS220+ vender_format_version=2 synoboot2 sn=22A0RLRBXGPKK macs=9009d03582e7,9009d03582e8 syno_ttyS0=pciserial,0x0:0x18.0x2,115200 syno_ttyS1=pciserial,0x0:0x18.0x0,115200