Even though it is obvious the AMI BIOS of this chinese mobo has some kind of PCIE3.0 bifurcation support. I tried inserting a x16 bifurcation card with 4xNVMe (WD SN570) and it showed only 1 NVMe (“Sandisk Corp WD Blue SN570 NVMe SSD”) when mobo bifurcation was at x16, and when mobo bifurcation was set to x4x4x4x4, only 1 “Sandisk Corp Device 501a” came out. Help or pointers needed.
I had tried the above bifurcation card on another mobo of mine (Supermicro x9srl) on a PCIe slot x16physical x8eletrical and indeed in OS I could see 2 NVMe’s showed up ready.
I had tried the above bifurcation card on another mobo of mine (Supermicro x9srl) on a PCIe slot x16physical x8eletrical and indeed in OS I could see 2 NVMe’s showed up ready.
Code:
NUMA = enable
IOH0 IOH1
x8 x8
x16 x16
x16 x16
# lspci -vt
\-[0000:00]-+-00.0 Intel Corporation Xeon E7 v2/Xeon E5 v2/Core i7 DMI2
+-01.0-[01]----00.0 Sandisk Corp WD Black 2018/SN750 / PC SN720 NVMe SSD
+-02.0-[02]----00.0 Sandisk Corp WD Blue SN570 NVMe SSD
+-03.0-[03]--
case:
NUMA = enable
IOH0 IOH1
x4x4 x4x4
x4x4x4x4 x4x4x4x4
x4x4x4x4 x16 (for nvidia graphic card support)
\-[0000:00]-+-00.0 Intel Corporation Xeon E7 v2/Xeon E5 v2/Core i7 DMI2
+-01.0-[01]----00.0 Sandisk Corp WD Black 2018/SN750 / PC SN720 NVMe SSD
+-01.1-[02]--
+-02.0-[03]----00.0 Sandisk Corp Device 501a
+-03.0-[04]--
# lshw | grep -i chip
product: C600/X79 series chipset PCI Express Virtual Root Port
product: C600/X79 series chipset USB2 Enhanced Host Controller #2
product: C600/X79 series chipset High Definition Audio Controller
product: C600/X79 series chipset PCI Express Root Port 1
product: C600/X79 series chipset PCI Express Root Port 3
product: C600/X79 series chipset PCI Express Root Port 4
product: C600/X79 series chipset PCI Express Root Port 6
product: C600/X79 series chipset USB2 Enhanced Host Controller #1
product: C600/X79 series chipset LPC Controller
product: C600/X79 series chipset 6-Port SATA AHCI Controller
product: C600/X79 series chipset SMBus Host Controller
# lshw | grep -i smbios
%filtered%
vendor: HUANANZHI
physical id: 0
version: VAA31
serial: MB-xxxxxxxxxxx
*-firmware:0
description: BIOS
vendor: American Megatrends Inc.
physical id: 0
version: 4.6.5
date: 03/28/2019
size: 64KiB
capacity: 6MiB
capabilities: pci upgrade shadowing cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer acpi usb biosbootspecification uefi
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