NAME

       systemd-storagetm.service, systemd-storagetm - Exposes all local block devices as NVMe-TCP mass storage
       devices

SYNOPSIS

       systemd-storagetm.service

       /usr/lib/systemd/systemd-storagetm [OPTIONS...] [DEVICE]

DESCRIPTION

       systemd-storagetm.service is a service that exposes all local block devices as NVMe-TCP mass storage
       devices. Its primary use-case is to be invoked by the storage-target-mode.target unit that can be booted
       into.

       Warning: the NVMe disks are currently exposed without authentication or encryption, in read/write mode.
       This means network peers may read from and write to the device without any restrictions. This
       functionality should hence only be used in a local setup.

       Note that to function properly networking must be configured too. The recommended mechanism to boot into
       a storage target mode is by adding "rd.systemd.unit=storage-target-mode.target ip=link-local" on the
       kernel command line. Note that "ip=link-local" only configures link-local IP, i.e. IPv4LL and IPv6LL,
       which means non-routable addresses. This is done for security reasons, so that only systems on the local
       link can access the devices. Use "ip=dhcp" to assign routable addresses too. For further details see
       systemd-network-generator.service(8).

       Unless the --all switch is used expects one or more block devices or regular files to expose via NVMe-TCP
       as argument.

OPTIONS

       The following options are understood:

       --nqn=
           Takes a string. If specified configures the NVMe Qualified Name to use for the exposed NVMe-TCP mass
           storage devices. The NQN should follow the syntax described in NVM Express Base Specification
           2.0c[1], section 4.5 "NVMe Qualified Names". Note that the NQN specified here will be suffixed with a
           dot and the the block device name before it is exposed on the NVMe target. If not specified defaults
           to "nqn.2023-10.io.systemd:storagetm.ID", where ID is replaced by a 128bit ID derived from machine-
           id(5).

           Added in version 255.

       --all, -a
           If specified exposes all local block devices via NVMe-TCP, current and future (i.e. it watches block
           devices come and go and updates the NVMe-TCP list as needed). Note that by default any block devices
           that originate on the same block device as the block device backing the current root file system are
           excluded. If the switch is specified twice this safety mechanism is disabled.

           Added in version 255.

       -h, --help
           Print a short help text and exit.

       --version
           Print a short version string and exit.

SEE ALSO

       systemd(1), systemd.special(7)

NOTES

        1. NVM Express Base Specification 2.0c
           https://nvmexpress.org/wp-content/uploads/NVM-Express-Base-Specification-2.0c-2022.10.04-Ratified.pdf

systemd 255                                                                         SYSTEMD-STORAGETM.SERVICE(8)