mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2025-10-26 18:05:04 +03:00
9530eb64e0
Sponsored-by: https://despairlabs.com/sponsor/ Signed-off-by: Rob Norris <robn@despairlabs.com> Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
169 lines
3.4 KiB
Groff
169 lines
3.4 KiB
Groff
.\" SPDX-License-Identifier: CDDL-1.0
|
|
.\"
|
|
.\" CDDL HEADER START
|
|
.\"
|
|
.\" The contents of this file are subject to the terms of the
|
|
.\" Common Development and Distribution License (the "License").
|
|
.\" You may not use this file except in compliance with the License.
|
|
.\"
|
|
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
|
.\" or https://opensource.org/licenses/CDDL-1.0.
|
|
.\" See the License for the specific language governing permissions
|
|
.\" and limitations under the License.
|
|
.\"
|
|
.\" When distributing Covered Code, include this CDDL HEADER in each
|
|
.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
|
.\" If applicable, add the following below this CDDL HEADER, with the
|
|
.\" fields enclosed by brackets "[]" replaced with your own identifying
|
|
.\" information: Portions Copyright [yyyy] [name of copyright owner]
|
|
.\"
|
|
.\" CDDL HEADER END
|
|
.\"
|
|
.\" Copyright 2013 Darik Horn <dajhorn@vanadac.com>. All rights reserved.
|
|
.\"
|
|
.\" lint-ok: WARNING: sections out of conventional order: Sh SYNOPSIS
|
|
.\"
|
|
.Dd May 26, 2021
|
|
.Dt ZHACK 1
|
|
.Os
|
|
.
|
|
.Sh NAME
|
|
.Nm zhack
|
|
.Nd libzpool debugging tool
|
|
.Sh DESCRIPTION
|
|
This utility pokes configuration changes directly into a ZFS pool,
|
|
which is dangerous and can cause data corruption.
|
|
.Sh SYNOPSIS
|
|
.Bl -tag -width Ds
|
|
.It Xo
|
|
.Nm zhack
|
|
.Cm feature stat
|
|
.Ar pool
|
|
.Xc
|
|
List feature flags.
|
|
.
|
|
.It Xo
|
|
.Nm zhack
|
|
.Cm feature enable
|
|
.Op Fl d Ar description
|
|
.Op Fl r
|
|
.Ar pool
|
|
.Ar guid
|
|
.Xc
|
|
Add a new feature to
|
|
.Ar pool
|
|
that is uniquely identified by
|
|
.Ar guid ,
|
|
which is specified in the same form as a
|
|
.Xr zfs 8
|
|
user property.
|
|
.Pp
|
|
The
|
|
.Ar description
|
|
is a short human readable explanation of the new feature.
|
|
.Pp
|
|
The
|
|
.Fl r
|
|
flag indicates that
|
|
.Ar pool
|
|
can be safely opened in read-only mode by a system that does not understand the
|
|
.Ar guid
|
|
feature.
|
|
.
|
|
.It Xo
|
|
.Nm zhack
|
|
.Cm feature ref
|
|
.Op Fl d Ns | Ns Fl m
|
|
.Ar pool
|
|
.Ar guid
|
|
.Xc
|
|
Increment the reference count of the
|
|
.Ar guid
|
|
feature in
|
|
.Ar pool .
|
|
.Pp
|
|
The
|
|
.Fl d
|
|
flag decrements the reference count of the
|
|
.Ar guid
|
|
feature in
|
|
.Ar pool
|
|
instead.
|
|
.Pp
|
|
The
|
|
.Fl m
|
|
flag indicates that the
|
|
.Ar guid
|
|
feature is now required to read the pool MOS.
|
|
.
|
|
.It Xo
|
|
.Nm zhack
|
|
.Cm label repair
|
|
.Op Fl cu
|
|
.Ar device
|
|
.Xc
|
|
Repair labels of a specified
|
|
.Ar device
|
|
according to options.
|
|
.Pp
|
|
Flags may be combined to do their functions simultaneously.
|
|
.
|
|
.Pp
|
|
The
|
|
.Fl c
|
|
flag repairs corrupted label checksums
|
|
.
|
|
.Pp
|
|
The
|
|
.Fl u
|
|
flag restores the label on a detached device
|
|
.Pp
|
|
Example:
|
|
.Nm zhack Cm label repair Fl cu Ar device
|
|
Fix checksums and undetach a device
|
|
.
|
|
.El
|
|
.
|
|
.Sh GLOBAL OPTIONS
|
|
The following can be passed to all
|
|
.Nm
|
|
invocations before any subcommand:
|
|
.Bl -tag -width "-d dir"
|
|
.It Fl c Ar cachefile
|
|
Read
|
|
.Ar pool
|
|
configuration from the
|
|
.Ar cachefile ,
|
|
which is
|
|
.Pa /etc/zfs/zpool.cache
|
|
by default.
|
|
.It Fl d Ar dir
|
|
Search for
|
|
.Ar pool
|
|
members in
|
|
.Ar dir .
|
|
Can be specified more than once.
|
|
.El
|
|
.
|
|
.Sh EXAMPLES
|
|
.Bd -literal
|
|
.No # Nm zhack Cm feature stat Ar tank
|
|
for_read_obj:
|
|
org.illumos:lz4_compress = 0
|
|
for_write_obj:
|
|
com.delphix:async_destroy = 0
|
|
com.delphix:empty_bpobj = 0
|
|
descriptions_obj:
|
|
com.delphix:async_destroy = Destroy filesystems asynchronously.
|
|
com.delphix:empty_bpobj = Snapshots use less space.
|
|
org.illumos:lz4_compress = LZ4 compression algorithm support.
|
|
|
|
.No # Nm zhack Cm feature enable Fl d No 'Predict future disk failures.' Ar tank com.example:clairvoyance
|
|
.No # Nm zhack Cm feature ref Ar tank com.example:clairvoyance
|
|
.Ed
|
|
.
|
|
.Sh SEE ALSO
|
|
.Xr ztest 1 ,
|
|
.Xr zpool-features 7 ,
|
|
.Xr zfs 8
|