Looking for 2+ NVMe card without bifurcation need

Discussion in 'RAID Controllers and Host Bus Adapters' started by stefan77, Jan 4, 2019.

  1. stefan77

    stefan77 New Member

    Joined:
    Mar 30, 2017
    Messages:
    3
    Likes Received:
    0
    Hey guys,

    it's becoming frustrating. I finally got hardware for a Xeon E-21xx system. Unfortunately, mainboard choices are very rare. I went Supermicro X11SCA-F.

    My requirement: TWO additional NVMe SSDs on ONE PCIe add on card.

    Seems no big deal. But: I purchased the Supermicro AOC-SLG3-2M2-P and it does not work.

    in Detail: I need a total of 4 NVMEs. 2 go onboard M.2. Fine. So I need 2 more. I could in theory use 2 AOC-SLG3-2M2-P cards. Tried it, works - each card populates 1 SSD. But then, the only remaining x4 slot on this particular board is shared with onboard M.2 connector #2. So if I put my Mellanox ConnectX in there, it won't be recognized.

    Seems a bit stuck here. What I am looking for is a 2 (or more) NVMe Adapter which does not rely on PCIe bifurcation.

    Any ideas?
     
    #1
  2. i386

    i386 Well-Known Member

    Joined:
    Mar 18, 2016
    Messages:
    1,593
    Likes Received:
    379
    Without pcie bifurcaton you will need an adapter with plx chips like the supermicro AOC-SHG3-4M2P
     
    #2
  3. pyro_

    pyro_ Active Member

    Joined:
    Oct 4, 2013
    Messages:
    726
    Likes Received:
    161
    I believe that the qnap qm2 cards have a pcie splitter on them and support either 2 or 4 m2 drives depending on the model of the card. They are also low profile cards
     
    #3
  4. llowrey

    llowrey Member

    Joined:
    Feb 26, 2018
    Messages:
    37
    Likes Received:
    12
    Take a look at this dual m.2 x16 card:

    https://www.amazon.com/CREST-SI-PEX40129-Ports-Bifurcation-Controller/dp/B07HYZY7P2

    It uses a PCIe switch instead of relying on bifurcation. It isn't cheap, but nothing with an onboard switch will be.

    I haven't used one but it is of particular interest to me because I'm stuck on PCIe2 and this would allow me to get full bandwidth from 2 NVMes when the card is in a x16 PCIe2 slot.

    The one amazon review confirms that this will work on older platforms that do not support bifurcation.
     
    #4
    ScootingCat likes this.
  5. nerdalertdk

    nerdalertdk Member

    Joined:
    Mar 9, 2017
    Messages:
    67
    Likes Received:
    12
    Ho

    I'm looking for the same thing, what did you end up with ?
     
    #5
  6. workingnonstop

    workingnonstop Active Member

    Joined:
    Feb 24, 2016
    Messages:
    227
    Likes Received:
    54
    Broadcom makes some tri-mode (SATA/SAS/NVME) HBAs that may fit the bill for you. See here - SAS/SATA/NVMe Host Bus Adapters

    I believe there are breakout cables available that allow for 2 NVME drives/port.
     
    #6
Similar Threads: Looking NVMe
Forum Title Date
RAID Controllers and Host Bus Adapters Need help: looking for SBR for LSI SAS2308 Rev B0 (9205-8e, or H221 with Rev B0) Friday at 12:06 AM
RAID Controllers and Host Bus Adapters Looking for RAID card recommendation Jan 16, 2019
RAID Controllers and Host Bus Adapters HP P2000G3, looking for firmware Jun 29, 2018
RAID Controllers and Host Bus Adapters Looking for Raid or HBA card after I broke my p420 Feb 26, 2018
RAID Controllers and Host Bus Adapters Looking for 16 port HBAs - what are my options? Feb 25, 2018

Share This Page