NVME-SHOW-TOPOLOGY(1) NVMe Manual NVME-SHOW-TOPOLOGY(1)

# [NAME](#NAME)

nvme-show-topology - Show topology of all NVMe subsystems

# [SYNOPSIS](#SYNOPSIS)

```
nvme [<global-options>] show-topology
```

# [DESCRIPTION](#DESCRIPTION)

Show the topology of all NVMe subsystems.

# [OPTIONS](#OPTIONS)

-r &lt;order&gt;, --ranking=&lt;order&gt;

Set the ranking orer to *namespace* (default) or *ctrl*. This option has only an effect for output format *normal*. The JSON output is always *namespace* ordered.

# [GLOBAL 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 &lt;fmt&gt;, --output-format=&lt;fmt&gt;

Set the reporting format to *normal*, *tabular, 'json*, or *binary*. Only one output format may be used at a time.

--output-format-version=&lt;version&gt;

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=&lt;ms&gt;

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)](/man/os/nvme-cli/nvme-cli.conf.5). A command-line flag always overrides the file.

# [EXAMPLES](#EXAMPLES)

nvme show-topology

# [NVME](#NVME)

Part of the nvme-user suite

09/18/2026 NVMe

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Document: nvme-show-topology(1) from nvme-cli 3.1-r1 (Chainguard OS)
Source: https://github.com/linux-nvme/nvme-cli