# nvme-list-subsys(1) Manual Page

## NAME

nvme-list-subsys - List all NVMe subsystems

## SYNOPSIS

    nvme list-subsys [-o <fmt> | --output-format=<fmt>] <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

-o <format>
--output-format=<format>

  Set the reporting format to normal or json. Only one output format can be used at a time.

## EXAMPLES

    root@host# 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# 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"
            },
            {
              "Name" : "nvme1",
              "Transport" : "rdma",
              "Address" : "traddr=1.1.1.3 trsvcid=4420 host_traddr=1.1.1.2"
            }
          ]
        },
        {
          "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"
            },
            {
              "Name" : "nvme3",
              "Transport" : "rdma",
              "Address" : "traddr=1.1.1.3 trsvcid=4420 host_traddr=1.1.1.1"
            }
          ]
        }
      ]
    }

## NVME

Part of the nvme-user suite