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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | NOTES | COLOPHON |
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SYSTEMD-S....SERVICE(8) systemd-storagetm.serviceSYSTEMD-S....SERVICE(8)
systemd-storagetm.service, systemd-storagetm - Exposes all local
block devices as NVMe-TCP mass storage devices
systemd-storagetm.service
/usr/lib/systemd/systemd-storagetm [OPTIONS...] [DEVICE]
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.
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.
systemd(1), systemd.special(7)
1. NVM Express Base Specification 2.0c
https://nvmexpress.org/wp-content/uploads/NVM-Express-Base-Specification-2.0c-2022.10.04-Ratified.pdf
This page is part of the systemd (systemd system and service
manager) project. Information about the project can be found at
⟨http:https://www.freedesktop.org/wiki/Software/systemd⟩. If you have
a bug report for this manual page, see
⟨http:https://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
This page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2023-12-22. (At that
time, the date of the most recent commit that was found in the
repository was 2023-12-22.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
[email protected]
systemd 255 SYSTEMD-S....SERVICE(8)
Pages that refer to this page: systemd.directives(7), systemd.index(7), systemd.special(7)
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HTML rendering created 2023-12-22 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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