NVME-REGISTRY-UPDA(1)             NVMe Manual            NVME-REGISTRY-UPDA(1)

NAME
       nvme-registry-update - Write an attribute to a controller's registry
       entry

SYNOPSIS
       nvme [<global-options>] registry update <device>
                               --attr=<ATTR> | -a <ATTR>
                               --value=<VAL> | -V <VAL>

DESCRIPTION
       Write an attribute to the ownership registry entry for an NVMe-oF
       controller. The registry is stored under /run/nvme/registry/ as one
       directory per live controller, with one plain-text file per attribute.
       The entry directory is created if it does not already exist.

       The <device> is the NVMe controller name (e.g. nvme3), given as a
       positional argument; the /dev/ prefix is optional.

       The owner attribute is normally recorded when the connection is created
       (e.g. by nvme connect --owner). Changing it by hand can stop an
       orchestrator from protecting the controller, so updating owner prompts
       for confirmation when run interactively; non-interactive callers
       (scripts) proceed without prompting. This is a guard against accidental
       mistakes, not access control -- a user with root can edit the files
       under /run/nvme/registry/ directly.

       Writes are atomic: a temporary file is written and synced, then renamed
       into place, preventing corruption under concurrent access.

OPTIONS
       -a <ATTR>, --attr=<ATTR>
           Attribute name to write (e.g. note, owner).

       -V <VAL>, --value=<VAL>
           New attribute value.

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
       o   Attach a free-form note to nvme3:

               # nvme registry update nvme3 --attr note --value "maintenance 2026-07"

       o   Update a previously written note:

               # nvme registry update nvme3 --attr note --value "released"

SEE ALSO
       nvme-registry-list(1) nvme-registry-retrieve(1) nvme-registry-delete(1)
       nvme-disconnect-all(1)

NVME
       Part of the nvme-user suite

NVMe                              09/07/2026             NVME-REGISTRY-UPDA(1)