Documentation for ndctl and daxctl


NAME

ndctl-list - dump the platform nvdimm device topology and attributes in json

SYNOPSIS

ndctl list [<options>]

Walk all the nvdimm buses in the system and list all attached devices along with some of their major attributes.

Options can be specified to limit the output to devices of a certain class. Where the classes are buses, dimms, regions, and namespaces. By default, ndctl list with no options is equivalent to:

ndctl list --namespaces --bus=all --region=all

EXAMPLE

# ndctl list --buses --namespaces

{
  "provider":"nfit_test.1",
  "dev":"ndbus2",
  "namespaces":[
    {
      "dev":"namespace9.0",
      "mode":"raw",
      "size":33554432,
      "blockdev":"pmem9"
    }
  ]
}
{
  "provider":"nfit_test.0",
  "dev":"ndbus1"
}
{
  "provider":"e820",
  "dev":"ndbus0",
  "namespaces":[
    {
      "dev":"namespace0.0",
      "mode":"fsdax",
      "size":8589934592,
      "blockdev":"pmem0"
    }
  ]
}

OPTIONS

-r; --region=
A ‘regionX’ device name, or a region id number. The keyword ‘all’ can be specified to carry out the operation on every region in the system, optionally filtered by bus id (see –bus= option).

-b; --bus=
Enforce that the operation only be carried on devices that are attached to the given bus. Where bus can be a provider name or a bus id number.

-d; --dimm=
An nmemX device name, or dimm id number. The dimm id number here is X in nmemX. Filter listing by devices that reference the given dimm. For example to see all namespaces comprised of storage capacity on nmem0:

# ndctl list --dimm=nmem0 --namespaces

-n; --namespace=
An namespaceX.Y device name, or namespace region plus id tuple X.Y. Limit the namespace list to the single identified device if present.

-t; --type=
Filter listing by region type (pmem or blk)

-m; --mode=
Filter listing by the mode (raw, fsdax, sector or devdax) of the namespace(s).

-U; --numa-node=
Filter listing by numa node

-B; --buses
Include bus info in the listing

-D; --dimms
Include dimm info in the listing

{
  "dev":"nmem0",
  "id":"cdab-0a-07e0-ffffffff",
  "handle":0,
  "phys_id":0,
  "security:":"disabled"
}

-H; --health
Include dimm health info in the listing. For example:

{
  "dev":"nmem0",
  "health":{
    "health_state":"non-critical",
    "temperature_celsius":23,
    "spares_percentage":75,
    "alarm_temperature":true,
    "alarm_spares":true,
    "temperature_threshold":40,
    "spares_threshold":5,
    "life_used_percentage":5,
    "shutdown_state":"clean"
  }
}

-F; --firmware
Include dimm firmware info in the listing. For example:

{
  "dev":"nmem0",
  "firmware":{
      "current_version":0,
      "next_version":1,
      "need_powercycle":true
  }
}

-X; --device-dax
Include device-dax (“daxregion”) details when a namespace is in “devdax” mode.

{
  "dev":"namespace0.0",
  "mode":"devdax",
  "size":4225761280,
  "uuid":"18ae1bbb-bb62-4efc-86df-4a5caacb5dcc",
  "daxregion":{
    "id":0,
    "size":4225761280,
    "align":2097152,
    "devices":[
      {
        "chardev":"dax0.0",
        "size":4225761280
      }
    ]
  }
}

-R; --regions
Include region info in the listing

-N; --namespaces
Include namespace info in the listing. Namespace info is listed by default if no other options are specified to the command.

-i; --idle
Include idle (not enabled) devices in the listing

-M; --media-errors
Include media errors (badblocks) in the listing. Note that the badblock_count property is included in the listing by default when the count is non-zero, otherwise it is hidden. Also, if the namespace is in sector mode the badblocks listing is not included and badblock_count property may include blocks that are located in metadata, or unused capacity in the namespace. Convert a sector namespace into raw mode to list precise badblocks offsets.

{
  "dev":"namespace7.0",
  "mode":"raw",
  "size":33554432,
  "blockdev":"pmem7",
  "badblock_count":17,
  "badblocks":[
    {
      "offset":4,
      "length":1
    },
    {
      "offset":32768,
      "length":8
    },
    {
      "offset":65528,
      "length":8
    }
  ]
}

-v; --verbose
Increase verbosity of the output. This can be specified multiple times to be even more verbose on the informational and miscellaneous output, and can be used to override omitted flags for showing specific information.

-u; --human
Format numbers representing storage sizes, or offsets as human readable strings with units instead of the default machine-friendly raw-integer data. Convert other numeric fields into hexadecimal strings.

# ndctl list --region=7
{
  "dev":"region7",
  "size":67108864,
  "available_size":67108864,
  "type":"pmem",
  "iset_id":-6382611090938810793,
  "badblock_count":8
}

# ndctl list --human --region=7
{
  "dev":"region7",
  "size":"64.00 MiB (67.11 MB)",
  "available_size":"64.00 MiB (67.11 MB)",
  "type":"pmem",
  "iset_id":"0xa76c6907811fae57",
  "badblock_count":8
}

COPYRIGHT

Copyright (c) 2016 - 2019, Intel Corporation. License GPLv2: GNU GPL version 2 http://gnu.org/licenses/gpl.html. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

ndctl-create-namespace