Thank you for your reply, I'am using unRaid 6.1.8, I didn't see the options of OVMF and SeaBIOS, can you tell me where can I select OVMF?
Another Question, I tried to switch the GT 210 to slot 2 and Titan X to slot 4, but this time the VM won't start when passing through either graphics cards.
error:
2016-02-18T09:07:05.110161Z qemu-system-x86_64: -device vfio-pci,host=06:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: vfio: error opening /dev/vfio/34: Operation not permitted
2016-02-18T09:07:05.110182Z qemu-system-x86_64: -device vfio-pci,host=06:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: vfio: failed to get group 34
2016-02-18T09:07:05.110192Z qemu-system-x86_64: -device vfio-pci,host=06:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: Device initialization failed
2016-02-18T09:07:05.110201Z qemu-system-x86_64: -device vfio-pci,host=06:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: Device 'vfio-pci' could not be initialized
2016-02-18 09:07:05.165+0000: shutting down
and the information in system devices:
02:00.0 USB controller: ASMedia Technology Inc. ASM1042A USB 3.0 Host Controller
04:00.0 VGA compatible controller: NVIDIA Corporation GT218 [GeForce 210] (rev a2)
04:00.1 Audio device: NVIDIA Corporation High Definition Audio Controller (rev a1)
06:00.0 VGA compatible controller: NVIDIA Corporation GM200 [GeForce GTX TITAN X] (rev a1)
06:00.1 Audio device: NVIDIA Corporation Device 0fb0 (rev a1)
IOMMU groups:
/sys/kernel/iommu_groups/33/devices/0000:04:00.0
/sys/kernel/iommu_groups/33/devices/0000:04:00.1
/sys/kernel/iommu_groups/34/devices/0000:06:00.0
/sys/kernel/iommu_groups/34/devices/0000:06:00.1
Thank you for your help!!!