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