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** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1811785

Title:
  NVDIMM-N doesn't work properly on Dell EMC PowerEdge R840

Status in linux package in Ubuntu:
  Incomplete
Status in ndctl package in Ubuntu:
  New

Bug description:
  On ubuntu 18.04.1 :

  1°) With 4.15.0-43 two default namespaces in raw mode are visible
  while there shouldn't be any but no settings change could be applied.

  root@server:~# ndctl list -R
  [
    {
      "dev":"region1",
      "size":103079215104,
      "available_size":0,
      "type":"pmem",
      "numa_node":1,
      "persistence_domain":"unknown"
    },
    {
      "dev":"region0",
      "size":103079215104,
      "available_size":0,
      "type":"pmem",
      "numa_node":0,
      "persistence_domain":"unknown"
    }
  ]

  root@server:~# ndctl list
  [
    {
      "dev":"namespace1.0",
      "mode":"raw",
      "size":103079215104,
      "sector_size":512,
      "blockdev":"pmem1",
      "numa_node":1
    },
    {
      "dev":"namespace0.0",
      "mode":"raw",
      "size":103079215104,
      "sector_size":512,
      "blockdev":"pmem0",
      "numa_node":0
    }
  ]

  root@server:~# ndctl create-namespace --reconfig=namespace1.0 --type=pmem 
--mode=sector -f
  libndctl: sizeof_namespace_index: nmem10: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem10: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem10: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem10: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem10: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem10: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem10: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem10: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem10: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem10: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem7: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem7: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem7: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem7: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem7: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem7: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem7: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem7: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem7: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem7: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem9: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem9: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem9: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem9: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem9: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem9: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem9: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem9: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem9: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem9: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem6: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem6: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem6: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem6: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem6: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem6: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem6: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem6: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem6: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem6: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem11: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem11: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem11: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem11: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem11: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem11: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem11: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem11: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem11: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem11: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem8: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem8: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem8: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem8: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem8: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem8: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem8: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem8: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem8: label area (1024) too small to host 
(256 byte) labels
  libndctl: sizeof_namespace_index: nmem8: label area (1024) too small to host 
(256 byte) labels
  failed to reconfigure namespace: No such device

  2°) With 4.18.0-13 no active namespaces are seen which seems more
  coherent for non initialized NVDIMM-N with labels but no namespace can
  be created.

  Both patches (kernel & ndctl) listed in the github issue below needs
  to be applied in order to get them working properly. Tested against
  the current hwe 4.18 kernel.

  https://github.com/pmem/ndctl/issues/78

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