AOC-SLG3-2M2 to Bifurcate or not Bifurcate on X9DRi-LN4F+

Discussion in 'RAID Controllers and Host Bus Adapters' started by John M., Mar 14, 2018.

  1. John M.

    John M. New Member

    Joined:
    Mar 7, 2016
    Messages:
    23
    Likes Received:
    0
    Hello everyone,

    I have a X9DRi-LN4F+ my cpu's are coming at the end of this week.

    I was wondering if the AOC-SLG3-2M2 would work on this board. It is officially not supported.

    However I have read on this forum that one NVME would work but two drives at the same time would not work since pcie slot needs Bifurcation to split the 8 lanes into 4 separate lanes.

    I checked the manual and found that there is Bifurcation control. Does this mean the AOC-SLG3-2M2 would work on this board? Here is what it says:


    IIO 2 PCIe Port Bifurcation Control

    This submenu congures the following IO PCIe Port Bifurcation Control settings for IIO 2 PCIe ports to determine how the available PCI-Express lanes to be distributed between the PCI-Exp. Root Ports.

    Any thoughts?

    Cheers!
    Karel.
     
    #1
  2. carcass

    carcass New Member

    Joined:
    Aug 14, 2017
    Messages:
    9
    Likes Received:
    0
    It doesn't work on latest BIOS -- indeed only top NVME drive is visible.
    bifurcation control is grayed out, and setting it manually by ruexe tool doesn't seem to work.
     
    #2
  3. satter

    satter New Member

    Joined:
    Oct 17, 2016
    Messages:
    4
    Likes Received:
    0
    I have X9DR3-F board and my AOC-SLG3-2M2 card is on the way. It could take 2-3 weeks.

    I'm gonna test it with two Samsung NVMe drives. If bifurcation works I will do a BIOS mod to support NVMe boot.
     
    #3
  4. John M.

    John M. New Member

    Joined:
    Mar 7, 2016
    Messages:
    23
    Likes Received:
    0
    I checked with supermicro but only asked if you would be able to boot from the pci-e drive. This is what they said:

    X9DRI-LN4F+ motherboard would support PCIe NVME drive. The OS and PCIe slot need to be in UEFI mode.
    Go to BIOS->Advanced->PCIe/PCI/PnP Configuration, change "Launch Storage OpROM policy" to "UEFI only". Then installed OS in UEFI.

    I didn't ask about the bifurcation because I decided to stick with a simple sata ssd. App launch times don't really matter to me beyond the sata ssd speed. Boot times don't matter much as well since I'm using a raid card that takes forever to load it's bios...
     
    #4
  5. satter

    satter New Member

    Joined:
    Oct 17, 2016
    Messages:
    4
    Likes Received:
    0
    I've checked mine AOC-SLG3-2M2 and could not make both ssd work, only first one does.
    I tried different slots and different bifurcation settings -- no luck.
    Is there any other passive PCI-e splitters for m2 drives?
     
    #5
  6. carcass

    carcass New Member

    Joined:
    Aug 14, 2017
    Messages:
    9
    Likes Received:
    0
    Update: it works with the recent BIOS update
     
    #6
  7. sovking

    sovking Member

    Joined:
    Jun 2, 2011
    Messages:
    31
    Likes Received:
    1
    You mean it bifurcate correctly on X9DRi-LN4F+ ? Have you tested with multiple nvme drive on the same slot ?
     
    #7
  8. carcass

    carcass New Member

    Joined:
    Aug 14, 2017
    Messages:
    9
    Likes Received:
    0
    "Yes" to both questions:)
     
    #8
  9. John M.

    John M. New Member

    Joined:
    Mar 7, 2016
    Messages:
    23
    Likes Received:
    0
    You mean version 3.3? Because that one has been out since 5/23/2018.
     
    #9
  10. carcass

    carcass New Member

    Joined:
    Aug 14, 2017
    Messages:
    9
    Likes Received:
    0
    It is dated 5/23/2018, but I'm not sure if it has been there since that date. Anyways, after upgrading to 3.3 it is possible to choose bifurcation mode in bios -- but that I tried with ruexe tool without success -- and it actually works now.
     
    #10
  11. copcopcopcop

    copcopcopcop New Member

    Joined:
    Feb 2, 2017
    Messages:
    10
    Likes Received:
    1
    anyone able to confirm if this works with the X9DRD-7LN4F board with BIOS v3.3?

    would the AOC-SHG3-4M2P card work as well?
     
    #11
  12. i386

    i386 Well-Known Member

    Joined:
    Mar 18, 2016
    Messages:
    1,554
    Likes Received:
    366
    This add on card has a plx pcie switch and doesn't require bifurcation support on the mainboard
     
    #12
  13. Philmatic

    Philmatic New Member

    Joined:
    Sep 15, 2011
    Messages:
    28
    Likes Received:
    2
    Funny timing, I JUST got the IT model of this board (X9DRD-7LN4F-JBOD) and the AOC-SLG3-2M2, along with two HP EX920 M.2 PCIe 3.1 x4 NVMe SSDs.

    I struggled with ordering it all without clear confirmation online that bifurciation does work on X19 boards, I figured it was worth the risk and worst case is I have to use 2 PCIe slots to use my two SSDs.

    With the latest bios (R 3.3), and setting bifurciation to 4x/4x on CPU 1/Slot 1, it works BEAUTIFULLY. I have both SSDs showing up in VMWare and have the full 1TB available. The screenshot below shows the performance to the NVMe drives from INSIDE a Windows guest VM, as well as the related VMWare info. I will try to get a screenshot of the BIOS setting the next time I reboot the host.

    upload_2019-3-24_16-41-24.png

    upload_2019-3-24_16-41-2.png
    upload_2019-3-24_16-42-35.png
    upload_2019-3-24_16-42-59.png
     
    #13
    copcopcopcop likes this.
  14. copcopcopcop

    copcopcopcop New Member

    Joined:
    Feb 2, 2017
    Messages:
    10
    Likes Received:
    1
    Great stuff. I wonder if it would also work with one of these AOC-SLG3-2E4 cards for 2 NVME connecters.
     
    #14
Similar Threads: AOC-SLG3-2M2 Bifurcate
Forum Title Date
RAID Controllers and Host Bus Adapters AOC-SLG3-2M2 question Feb 21, 2017
RAID Controllers and Host Bus Adapters Supermicro AOC-SLG3-2M2 Dual M2 card Oct 7, 2016

Share This Page