1.\" SPDX-License-Identifier: CDDL-1.0 2.\" 3.\" CDDL HEADER START 4.\" 5.\" The contents of this file are subject to the terms of the 6.\" Common Development and Distribution License (the "License"). 7.\" You may not use this file except in compliance with the License. 8.\" 9.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10.\" or https://opensource.org/licenses/CDDL-1.0. 11.\" See the License for the specific language governing permissions 12.\" and limitations under the License. 13.\" 14.\" When distributing Covered Code, include this CDDL HEADER in each 15.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16.\" If applicable, add the following below this CDDL HEADER, with the 17.\" fields enclosed by brackets "[]" replaced with your own identifying 18.\" information: Portions Copyright [yyyy] [name of copyright owner] 19.\" 20.\" CDDL HEADER END 21.\" 22.\" Copyright 2013 Darik Horn <dajhorn@vanadac.com>. All rights reserved. 23.\" 24.Dd May 26, 2021 25.Dt FSCK.ZFS 8 26.Os 27. 28.Sh NAME 29.Nm fsck.zfs 30.Nd dummy ZFS filesystem checker 31.Sh SYNOPSIS 32.Nm 33.Op Ar options 34.Ar dataset Ns No … 35. 36.Sh DESCRIPTION 37.Nm 38is a thin shell wrapper that at most checks the status of a dataset's container 39pool. 40It is installed by OpenZFS because some Linux 41distributions expect a fsck helper for all filesystems. 42.Pp 43If more than one 44.Ar dataset 45is specified, each is checked in turn and the results binary-ored. 46. 47.Sh OPTIONS 48Ignored. 49. 50.Sh NOTES 51ZFS datasets are checked by running 52.Nm zpool Cm scrub 53on the containing pool. 54An individual ZFS dataset is never checked independently of its pool, 55which is unlike a regular filesystem. 56.Pp 57However, the 58.Xr fsck 8 59interface still allows it to communicate some errors: if the 60.Ar dataset 61is in a degraded pool, then 62.Nm 63will return exit code 64.Sy 4 65to indicate an uncorrected filesystem error. 66.Pp 67Similarly, if the 68.Ar dataset 69is in a faulted pool and has a legacy 70.Pa /etc/fstab 71record, then 72.Nm 73will return exit code 74.Sy 8 75to indicate a fatal operational error. 76.Sh SEE ALSO 77.Xr fstab 5 , 78.Xr fsck 8 , 79.Xr zpool-scrub 8 80