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

       /usr/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.

           Added in version 186.

       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.

           Added in version 213.

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)