NVME-RESV-REPORT(1) NVMe Manual NVME-RESV-REPORT(1)

# [NAME](#NAME)

nvme-resv-report - Send NVMe Reservation Report, parse the result

# [SYNOPSIS](#SYNOPSIS)

```
nvme [<global-options>] resv report <device>


                        [--namespace-id=<nsid> | -n <nsid>]


                        [--numd=<num-dwords> | -d <num-dwords>]


                        [--eds | -e]


                        [--raw-binary | -b]
```

# [DESCRIPTION](#DESCRIPTION)

The Reservation Report command returns a Reservation Status data structure to host memory that describes the registration and reservation status of a namespace.

The size of the Reservation Status data structure is a function of the number of controllers in the NVM Subsystem that are associated with hosts that are registrants of the namespace (i.e., there is a Registered Controller data structure for each such controller).

That size is not known in advance, so the transfer is sized automatically: the fixed-size header of the structure is read first, and the structure is then read again with a buffer large enough to hold every registrant the namespace reports. Pass *--numd* to transfer a fixed length instead.

The bare *nvme resv-report* form (without a space) still works as a deprecated alias and will be removed in a future major version. New scripts should use *nvme resv report* instead.

# [OPTIONS](#OPTIONS)

-n &lt;nsid&gt;, --namespace-id=&lt;nsid&gt;

Retrieve the reservation report structure for the given nsid. This is required for the character devices, or overrides the block nsid if given.

-d &lt;num-dwords&gt;, --numd=&lt;num-dwords&gt;

Transfer a fixed number of Dwords of the Reservation Status structure instead of sizing the transfer automatically. The count is zero-based, so one Dword more than requested is transferred.

-e, --eds

Request extended Data Structure: If this bit is set to a *1*, then the controller returns the Extended Data Structure.

-b, --raw-binary

Print the raw buffer to stdout. Structure is not parsed by program.

# [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)

No examples yet.

# [NVME](#NVME)

Part of the nvme-user suite

09/18/2026 NVMe

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