SYSTEMD-FSCK@.SERVICE(8) systemd-fsck@.service SYSTEMD-FSCK@.SERVICE(8)
systemd-fsck@.service, systemd-fsck-root.service, systemd-fsck - File
system checker logic
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 only if the root filesystem was not checked in
the initramfs. systemd-fsck@.service is used for all other file
systems and for the root file system in the initramfs.
These 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 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
(/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.
KERNEL COMMAND LINE
systemd-fsck understands these kernel command line parameters:
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.
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 237 SYSTEMD-FSCK@.SERVICE(8)
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