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doc: Add more explanation for --one-file-system option

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NoNE 2020-08-21 18:10:02 +02:00 committed by Leo R. Lundgren
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doc/040_backup.rst
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@ -213,13 +213,29 @@ On most Unixy shells, you can either quote or use backslashes. For example:
By specifying the option ``--one-file-system`` you can instruct restic
to only backup files from the file systems the initially specified files
or directories reside on. For example, calling restic like this won't
backup ``/sys`` or ``/dev`` on a Linux system:
or directories reside on. In other words, it will prevent restic from crossing
filesystem boundaries when performing a backup.
For example, if you backup ``/`` with this option and you have external
media mounted under ``/media/usb`` then restic will not back up ``/media/usb``
at all because this is a different filesystem than ``/``. Virtual filesystems
such as ``/proc`` are also considered different and thereby excluded when
using ``--one-file-system``:
.. code-block:: console
$ restic -r /srv/restic-repo backup --one-file-system /
Please note that this does not prevent you from specifying multiple filesystems
on the command line, e.g:
.. code-block:: console
$ restic -r /srv/restic-repo backup --one-file-system / /media/usb
will back up both the ``/`` and ``/media/usb`` filesystems, but will not
include other filesystems like ``/sys`` and ``/proc``.
.. note:: ``--one-file-system`` is currently unsupported on Windows, and will
cause the backup to immediately fail with an error.