NVME-LIST-SUBSYS(1)

NAME
nvme-list-subsys - List all NVMe subsystems

SYNOPSIS

nvme [<global-options>] list-subsys <device>

DESCRIPTION

Scan the sysfs tree for NVM Express subsystems and return the controllers for those subsystems as well as some pertinent information about them. If a device is given, print out only the values for the controllers and subsystems leading to the device.

OPTIONS

GLOBAL OPTIONS

The following options are defined at the top-level nvme command and are available to this subcommand:

--dry-run
    Print the command that would be executed, but do not actually execute it.

--no-ioctl-probing
    Disable probing for 64-bit IOCTL support.

--no-retries
    Disable retry logic on transient errors.

-o <fmt>, --output-format=<fmt>
    Set the reporting format to normal, tabular, 'json, or binary. Only one output format may be used at a time.

--output-format-version=<version>
    Select the output format version. Version 1 uses the original field naming, while version 2 (default) provides more consistent and script-friendly field names.

--timeout=<ms>
    Set the timeout for the command in milliseconds.

-v, --verbose
    Increase the level of detail in the output. May be specified multiple times to further increase verbosity.

These options can also be set as machine-wide defaults in nvme-cli.conf(5). A command-line flag always overrides the file.

EXAMPLES

    root@host[1]# nvme list-subsys
    nvme-subsys0 - NQN=nvmf-test
    \
     +- nvme0 rdma traddr=1.1.1.3,trsvcid=4420,host_traddr=1.1.1.1
     +- nvme1 rdma traddr=1.1.1.3,trsvcid=4420,host_traddr=1.1.1.2
    nvme-subsys1 - NQN=nvmf-test2
    \
     +- nvme2 rdma traddr=1.1.1.3,trsvcid=4420,host_traddr=1.1.1.2
     +- nvme3 rdma traddr=1.1.1.3,trsvcid=4420,host_traddr=1.1.1.1

    root@host[1]# nvme list-subsys -o json
    {
      "Subsystems" : [
        {
          "Name" : "nvme-subsys0",
          "NQN" : "nvmf-test"
        },
        {
          "Paths" : [
            {
              "Name" : "nvme0",
              "Transport" : "rdma",
              "Address" : "traddr=1.1.1.3,trsvcid=4420,host_traddr=1.1.1.1",
              "AddressDetails" : {
                "traddr" : "1.1.1.3",
                "host_traddr" : "1.1.1.1",
                "trsvcid" : "4420"
              }
            },
            {
              "Name" : "nvme1",
              "Transport" : "rdma",
              "Address" : "traddr=1.1.1.3,trsvcid=4420,host_traddr=1.1.1.2",
              "AddressDetails" : {
                "traddr" : "1.1.1.3",
                "host_traddr" : "1.1.1.2",
                "trsvcid" : "4420"
              }
            }
          ]
        },
        {
          "Name" : "nvme-subsys1",
          "NQN" : "nvmf-test2"
        },
        {
          "Paths" : [
            {
              "Name" : "nvme2",
              "Transport" : "rdma",
              "Address" : "traddr=1.1.1.3,trsvcid=4420,host_traddr=1.1.1.2",
              "AddressDetails" : {
                "traddr" : "1.1.1.3",
                "host_traddr" : "1.1.1.2",
                "trsvcid" : "4420"
              }
            },
            {
              "Name" : "nvme3",
              "Transport" : "rdma",
              "Address" : "traddr=1.1.1.3,trsvcid=4420,host_traddr=1.1.1.1",
              "AddressDetails" : {
                "traddr" : "1.1.1.3",
                "host_traddr" : "1.1.1.1",
                "trsvcid" : "4420"
              }
            }
          ]
        }
      ]
    }

NVME

Part of the nvme-user suite

NOTES

1.  root@host
    mailto:root@host