Can you ensure you are booted into the test kernel posted in comment #2? It should have the following text in the uname -a output: "lp1758205"
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1758205 Title: Ubuntu 18.04 NVMe disks are not displayed on lsblk and /dev/disk/by- path (NVMe / Bolt ) (systemd?) Status in The Ubuntu-power-systems project: In Progress Status in linux package in Ubuntu: In Progress Status in linux source package in Bionic: In Progress Bug description: ---Problem Description--- Bolt based NVMe disks (namespaces) are not displayed on lsblk and /dev/disk/by-path # nvme list Node SN Model Namespace Usage Format FW Rev ---------------- -------------------- ---------------------------------------- --------- -------------------------- ---------------- -------- /dev/nvme0n1 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 1 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n10 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 10 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n11 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 11 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n12 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 12 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n13 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 13 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n14 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 14 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n15 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 15 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n16 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 16 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n17 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 17 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n18 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 18 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n19 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 19 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n2 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 2 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n20 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 20 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n21 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 21 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n22 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 22 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n23 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 23 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n24 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 24 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n25 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 25 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n26 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 26 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n27 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 27 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n28 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 28 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n29 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 29 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n3 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 3 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n30 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 30 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n31 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 31 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n32 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 32 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n4 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 4 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n5 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 5 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n6 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 6 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n7 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 7 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n8 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 8 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 /dev/nvme0n9 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8 9 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12 # lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 1 931.5G 0 disk ??sda1 8:1 1 7M 0 part ??sda2 8:2 1 931.5G 0 part / sdb 8:16 1 931.5G 0 disk ??sdb1 8:17 1 7M 0 part ??sdb2 8:18 1 9.3G 0 part ??sdb3 8:19 1 856.8G 0 part ??sdb4 8:20 1 1K 0 part ??sdb5 8:21 1 1G 0 part ??sdb6 8:22 1 64.4G 0 part ??rhelaa_ltciofvtr--spoon400-swap 253:0 0 4G 0 lvm ??rhelaa_ltciofvtr--spoon400-home 253:1 0 19.8G 0 lvm ??rhelaa_ltciofvtr--spoon400-root 253:2 0 40.6G 0 lvm ---uname output--- # uname -a Linux ltciofvtr-spoon4 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13 18:21:52 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux Machine Type = AC922 ---Steps to Reproduce--- 1> install Ubuntu 18.04 on AC922 system 2> make sure Bolt adapter is present in the system 0003:01:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co Ltd NVMe SSD Controller 172Xa [144d:a822] (rev 01) 3> create name space using following script #!/bin/bash device=/dev/nvme0 echo $device nvme format $device nvme set-feature $device -f 0x0b --value=0x0100 nvme delete-ns $device -n 0xFFFFFFFF sleep 5 nvme list nvme get-log $device -l 200 -i 4 max=`nvme id-ctrl $device | grep ^nn | awk '{print $NF}'` for i in $(eval echo {1..$max}) do echo $i nvme create-ns $device --nsze=7000000 --ncap=7000000 --flbas=0 --dps=0 nvme attach-ns $device --namespace-id=$i --controllers=`nvme list-ctrl $device | awk -F: '{print $2}'` sleep 2 nvme get-log $device -l 200 -i 4 sleep 2 done nvme list 4> run #nvme ns-rescan /dev/nvme0 ; #lsblk == After discussion with the owner of lsblk and several maintainers of nvme developers, we removed slaves and holders for multipath NVME. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/nvme/host/core.c?h=v4.16-rc6&id=8a30ecc6e0ecbb9ae95daf499b2680b885ed0349 Revert "nvme: create 'slaves' and 'holders' entries for hidden cont I have verified the patch with the latest kernel. 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