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netmano
Asked: 2019-02-23 09:35:40 +0800 CST

ASUS HyperX M.2 x4 only the first device is visible under Ubuntu

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I have a Dell T320 with an ASUS HyperX M.2 x4 PCI-e card (in a PCI-e 3.0 x16 socket), and two Samsung 970 PRO in it (in slot 1 and slot 2 of Hyper M.2), but under Ubuntu 18.04.2 LTS I only see the NVMe device inserted in solot 1 of Hyper M.2. I tried with fdisk -l, and nvme list tools.

Is there any trick to get the slot 2 working under Linux?

root@server:/root# nvme list
Node             SN                   Model                                    Namespace Usage                      Format           FW Rev
---------------- -------------------- ---------------------------------------- --------- -------------------------- ---------------- --------
/dev/nvme0n1     S463NF0K820143E      Samsung SSD 970 PRO 512GB                1           0.00   B / 512.11  GB    512   B +  0 B   1B2QEXP7
ubuntu

2 Answers

  1. You may need to setup PCIe slot bifurcation, i.e. split x16 link to four x4 links.

    • 2

  2. Try to use different slots combination on the card. Based on this it should be with Slot_1 and Slot_3 -> https://www.asus.com/us/support/FAQ/1037507/?fbclid=IwAR2usDcn9hBU5qnKogNmWSVJg5azaPW_-hRKXQ5__JVSLA4KEOyBDwlEKN8

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