SYSTEMD-FSCK@.SERVICE(8) systemd-fsck@.service SYSTEMD-FSCK@.SERVICE(8)
NAME
systemd-fsck@.service, systemd-fsck-root.service, systemd-fsck-
usr.service, systemd-fsck - File system checker logic
SYNOPSIS
systemd-fsck@.service
systemd-fsck-root.service
systemd-fsck-usr.service
/lib/systemd/systemd-fsck
DESCRIPTION
systemd-fsck@.service, systemd-fsck-root.service, and
systemd-fsck-usr.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 and
systemd-fsck-usr.service are responsible for file system checks on the
root and /usr file system, respectively, but only if the root
filesystem was not checked in the initrd. systemd-fsck@.service is
used for all other file systems and for the root file system in the
initrd.
These services are started at boot if passno in /etc/fstab for the file
system is set to a value greater than zero, but only if it is also
configured to be mounted at boot (i.e. without "noauto" option). 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 on
the same rotating disk.
systemd-fsck does not know any details about specific filesystems, and
simply executes file system checkers specific to each filesystem type
(fsck.type). These checkers will decide if the filesystem should
actually be checked based on the time since last check, number of
mounts, unclean unmount, etc.
systemd-fsck-root.service and systemd-fsck-usr.service will activate
reboot.target if fsck returns the "System should reboot" condition, or
emergency.target if fsck returns the "Filesystem errors left
uncorrected" condition.
systemd-fsck@.service will fail if fsck returns with either "System
should reboot" or "Filesystem errors left uncorrected" conditions. For
filesystems listed in /etc/fstab without "nofail" or "noauto" options,
"local-fs.target" will then activate emergency.target.
KERNEL COMMAND LINE
systemd-fsck understands these kernel command line parameters:
fsck.mode=
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.
fsck.repair=
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.
SEE ALSO
systemd(1), fsck(8), systemd-quotacheck.service(8), fsck.btrfs(8),
fsck.cramfs(8), fsck.ext4(8), fsck.fat(8), fsck.hfsplus(8),
fsck.minix(8), fsck.ntfs(8), fsck.xfs(8)
systemd 252 SYSTEMD-FSCK@.SERVICE(8)
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