fsck.zfs - Dummy ZFS filesystem checker.
fsck.zfs [options] <dataset>
is a shell stub that does nothing and always returns true. It is
installed by ZoL because some Linux distributions expect a fsck helper for all
and the dataset
ZFS datasets are checked by running zpool scrub
on the containing pool.
An individual ZFS dataset is never checked independently of its pool, which is
unlike a regular filesystem.
On some systems, if the dataset
is in a degraded pool, then it might be
appropriate for fsck.zfs
to return exit code 4 to indicate an
uncorrected filesystem error.
Similarly, if the dataset
is in a faulted pool and has a legacy
/etc/fstab record, then fsck.zfs
should return exit code 8 to indicate
a fatal operational error.
Darik Horn <firstname.lastname@example.org>.