systemd-fsck@.service and systemd-fsck-root.service are services
responsible for file system checks. They are instantiated for each
device that is configured for file system checking.
systemd-fsck-root.service is responsible for file system checks on
the root file system, but in only if the root filesystem wasn't
checked in the initramfs. systemd-fsck@.service is used for all
other file systems and for the root file system in the initramfs.
Those services are started at boot if passno in /etc/fstab for the
file system is set to a value greater than zero. The file system
check for root is performed before the other file systems. Other file
systems may be checked in parallel, except when they are one the same
systemd-fsck does not know any details about specific filesystems,
and simply executes file system checkers specific to each filesystem
type (/sbin/fsck.*). This helper will decide if the filesystem should
actually be checked based on the time since last check, number of
mounts, unclean unmount, etc.
If a file system check fails for a service without nofail, emergency
mode is activated, by isolating to emergency.target.
systemd-fsck understands one kernel command line parameter:
One of "auto", "force", "skip". Controls the mode of operation.
The default is "auto", and ensures that file system checks are
done when the file system checker deems them necessary. "force"
unconditionally results in full file system checks. "skip" skips
any file system checks.
One of "preen", "yes", "no". Controls the mode of operation. The
default is " preen", and will automatically repair problems that
can be safely fixed. "yes " will answer yes to all questions by
fsck and "no" will answer no to all questions.
This page is part of the systemd (systemd system and service manager)
project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a bug
report for this manual page, see
page was obtained from the project's upstream Git repository
(git://anongit.freedesktop.org/systemd/systemd) on 2015-09-22. 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
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systemd 222 SYSTEMD-FSCK@.SERVICE(8)