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freebsd-dev/sbin/dumpfs/dumpfs.8

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BSD 4.4 Lite sbin Sources Note: XNSrouted and routed NOT imported here, they shall be imported with usr.sbin.
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.\" Copyright (c) 1983, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
Renumber copyright clause 4 Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
2017-02-28 23:42:47 +00:00
.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" @(#)dumpfs.8 8.1 (Berkeley) 6/5/93
$Id$ -> $FreeBSD$
1999-08-28 00:22:10 +00:00
.\" $FreeBSD$
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.\"
dumpfs(8): add option to only print superblock information Add an option to dumpfs, `-s`, that only prints the super block information. Reviewed by: chs, imp Differential Revision: https://reviews.freebsd.org/D30881
2021-07-02 22:18:17 +00:00
.Dd July 2, 2021
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.Dt DUMPFS 8
mdoc(7) police: removed HISTORY info from the .Os call.
2001-07-10 11:04:34 +00:00
.Os
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.Sh NAME
.Nm dumpfs
We now have multiple filesystems (UFS, ZFS, ...), so for tools that only operate on one type of filesystem, mention this. While here, capitalise the use of "UFS" in growfs.8 to match other uses of the term in other man pages. MFC after: 1 week
2011-05-08 12:34:31 +00:00
.Nd dump UFS file system information
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.Sh SYNOPSIS
mdoc(7) police: use the new features of the Nm macro.
2000-11-20 16:52:27 +00:00
.Nm
Add a new flag to dumpfs(8), -f, which causes dumpfs to list all free fragments in the file system by fragment (block) number. This new mode does the necessary arithmetic to generate absolute fragment numbers rather than than the cg-relative numbers printed in the default mode. If -f is passed once, contiguous fragment ranges are collapsed into an X-Y format as free block lists are currently printed in regular dumpfs output, but if specified twice, all block numbers are printed individually, allowing both compact and more script-friendly representation. This proves quite handy when attempting to recover deleted data, as it allows exclusion of non-deleted data from blocks searched. MFC after: 1 week Discussed with: jeff, Richard Clayton <richard dot clayton at cl.cam.ac.uk> Sponsored by: Google, Inc.
2009-01-28 09:33:00 +00:00
.Op Fl f
Add a -l option to show file system's corresponding /dev/ufsid path. This is useful for scripts that converts existing system's fstab to use their /dev/ufsid devices. MFC after: 2 weeks
2011-07-14 08:06:03 +00:00
.Op Fl l
Add support to marshal a filesystem to a newfs(8) command that could be used to create it. A small number of options are not marshalled as they are things it would be dumb to spit out, as they are used by internal computations, and newfs may change them, or they may not be directly apparent.
2003-01-19 10:25:11 +00:00
.Op Fl m
dumpfs(8): add option to only print superblock information Add an option to dumpfs, `-s`, that only prints the super block information. Reviewed by: chs, imp Differential Revision: https://reviews.freebsd.org/D30881
2021-07-02 22:18:17 +00:00
.Op Fl s
Sync program's usage() with manpage's SYNOPSIS.
2005-02-10 09:19:34 +00:00
.Ar filesys | device
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.Sh DESCRIPTION
The .Nm utility
2002-07-06 19:34:18 +00:00
The
.Nm
We now have multiple filesystems (UFS, ZFS, ...), so for tools that only operate on one type of filesystem, mention this. While here, capitalise the use of "UFS" in growfs.8 to match other uses of the term in other man pages. MFC after: 1 week
2011-05-08 12:34:31 +00:00
utility prints out the UFS super block and cylinder group information
Add a new flag to dumpfs(8), -f, which causes dumpfs to list all free fragments in the file system by fragment (block) number. This new mode does the necessary arithmetic to generate absolute fragment numbers rather than than the cg-relative numbers printed in the default mode. If -f is passed once, contiguous fragment ranges are collapsed into an X-Y format as free block lists are currently printed in regular dumpfs output, but if specified twice, all block numbers are printed individually, allowing both compact and more script-friendly representation. This proves quite handy when attempting to recover deleted data, as it allows exclusion of non-deleted data from blocks searched. MFC after: 1 week Discussed with: jeff, Richard Clayton <richard dot clayton at cl.cam.ac.uk> Sponsored by: Google, Inc.
2009-01-28 09:33:00 +00:00
for the file system or special device specified, unless the
Add a -l option to show file system's corresponding /dev/ufsid path. This is useful for scripts that converts existing system's fstab to use their /dev/ufsid devices. MFC after: 2 weeks
2011-07-14 08:06:03 +00:00
.Fl f ,
dumpfs(8): add option to only print superblock information Add an option to dumpfs, `-s`, that only prints the super block information. Reviewed by: chs, imp Differential Revision: https://reviews.freebsd.org/D30881
2021-07-02 22:18:17 +00:00
.Fl l ,
.Fl m ,
Add a new flag to dumpfs(8), -f, which causes dumpfs to list all free fragments in the file system by fragment (block) number. This new mode does the necessary arithmetic to generate absolute fragment numbers rather than than the cg-relative numbers printed in the default mode. If -f is passed once, contiguous fragment ranges are collapsed into an X-Y format as free block lists are currently printed in regular dumpfs output, but if specified twice, all block numbers are printed individually, allowing both compact and more script-friendly representation. This proves quite handy when attempting to recover deleted data, as it allows exclusion of non-deleted data from blocks searched. MFC after: 1 week Discussed with: jeff, Richard Clayton <richard dot clayton at cl.cam.ac.uk> Sponsored by: Google, Inc.
2009-01-28 09:33:00 +00:00
or
dumpfs(8): add option to only print superblock information Add an option to dumpfs, `-s`, that only prints the super block information. Reviewed by: chs, imp Differential Revision: https://reviews.freebsd.org/D30881
2021-07-02 22:18:17 +00:00
.Fl s
Add a new flag to dumpfs(8), -f, which causes dumpfs to list all free fragments in the file system by fragment (block) number. This new mode does the necessary arithmetic to generate absolute fragment numbers rather than than the cg-relative numbers printed in the default mode. If -f is passed once, contiguous fragment ranges are collapsed into an X-Y format as free block lists are currently printed in regular dumpfs output, but if specified twice, all block numbers are printed individually, allowing both compact and more script-friendly representation. This proves quite handy when attempting to recover deleted data, as it allows exclusion of non-deleted data from blocks searched. MFC after: 1 week Discussed with: jeff, Richard Clayton <richard dot clayton at cl.cam.ac.uk> Sponsored by: Google, Inc.
2009-01-28 09:33:00 +00:00
flag is specified.
Mechanically kill hard sentence breaks.
2004-07-02 21:45:06 +00:00
The listing is very long and detailed.
This
s/filesystem/file system/g as discussed on -developers
2002-08-21 18:11:48 +00:00
command is useful mostly for finding out certain file system
information such as the file system block size and minimum
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free space percentage.
Add support to marshal a filesystem to a newfs(8) command that could be used to create it. A small number of options are not marshalled as they are things it would be dumb to spit out, as they are used by internal computations, and newfs may change them, or they may not be directly apparent.
2003-01-19 10:25:11 +00:00
.Pp
If
Add a new flag to dumpfs(8), -f, which causes dumpfs to list all free fragments in the file system by fragment (block) number. This new mode does the necessary arithmetic to generate absolute fragment numbers rather than than the cg-relative numbers printed in the default mode. If -f is passed once, contiguous fragment ranges are collapsed into an X-Y format as free block lists are currently printed in regular dumpfs output, but if specified twice, all block numbers are printed individually, allowing both compact and more script-friendly representation. This proves quite handy when attempting to recover deleted data, as it allows exclusion of non-deleted data from blocks searched. MFC after: 1 week Discussed with: jeff, Richard Clayton <richard dot clayton at cl.cam.ac.uk> Sponsored by: Google, Inc.
2009-01-28 09:33:00 +00:00
.Fl f
is specified, a sorted list of all free fragments and free fragment ranges,
as represented in cylinder group block free lists, is printed.
If the flag is specified twice, contiguous free fragments are not collapsed
into ranges and instead printed in a simple list.
Fragment numbers may be converted to raw byte offsets by multiplying by the
fragment size, which may be useful when recovering deleted data.
.Pp
If
Add a -l option to show file system's corresponding /dev/ufsid path. This is useful for scripts that converts existing system's fstab to use their /dev/ufsid devices. MFC after: 2 weeks
2011-07-14 08:06:03 +00:00
.Fl l
is specified, the pathname to the file system's container derived from
its unique identifier is printed.
.Pp
If
Add support to marshal a filesystem to a newfs(8) command that could be used to create it. A small number of options are not marshalled as they are things it would be dumb to spit out, as they are used by internal computations, and newfs may change them, or they may not be directly apparent.
2003-01-19 10:25:11 +00:00
.Fl m
Replace incomprehensive description of -m by much clearer text from OpenBSD, with the exception of one word. PR: docs/112465 Submitted by: naddy Obtained from: OpenBSD MFC after: 1 week
2007-05-12 22:35:22 +00:00
is specified, a
Add support to marshal a filesystem to a newfs(8) command that could be used to create it. A small number of options are not marshalled as they are things it would be dumb to spit out, as they are used by internal computations, and newfs may change them, or they may not be directly apparent.
2003-01-19 10:25:11 +00:00
.Xr newfs 8
Replace incomprehensive description of -m by much clearer text from OpenBSD, with the exception of one word. PR: docs/112465 Submitted by: naddy Obtained from: OpenBSD MFC after: 1 week
2007-05-12 22:35:22 +00:00
command is printed that can be used to generate a new file system
with equivalent settings.
When running the -m option to generate a newfs(8) command suitable for recreating the filesystem, check for and output the -i, -k, and -l options if appropriate. Note the remaining deficiencies of the -m option in the dumpfs(8) manual page. Specifically that newfs(8) options -E, -R, -S, and -T options are not handled and that -p is not useful so is omitted. Also document that newfs(8) options -n and -r are neither checked for nor output but should be. The -r flag is needed if the filesystem uses gjournal(8). PR: bin/163992 Reported by: Dieter <freebsd@sopwith.solgatos.com> Submitted by: Andy Kosela <akosela@andykosela.com> MFC after: 1 week
2013-05-16 20:07:08 +00:00
Please note that
.Xr newfs 8
options
.Fl E ,
.Fl R ,
.Fl S ,
and
.Fl T
are not handled and
.Fl p
is not useful in this case so is omitted.
.Xr Newfs 8
options
.Fl n
and
.Fl r
are neither checked for nor output but should be.
The
.Fl r
flag is needed if the filesystem uses
.Xr gjournal 8 .
dumpfs(8): add option to only print superblock information Add an option to dumpfs, `-s`, that only prints the super block information. Reviewed by: chs, imp Differential Revision: https://reviews.freebsd.org/D30881
2021-07-02 22:18:17 +00:00
.Pp
If
.Fl s
is specified, only the super block information is printed.
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.Sh SEE ALSO
Sort cross references.
1997-01-13 00:25:51 +00:00
.Xr fs 5 ,
.Xr fsck 8 ,
It's 2015, and some people are still trying to use fdisk and then go asking what debug flags to set for GEOM to make it work. Advice them to use gpart(8) instead. Something similar should probably done with disklabel, but I need to rewrite the disklabel examples first. Reviewed by: wblock@ MFC after: 1 month Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D3315
2015-09-02 14:08:43 +00:00
.Xr gpart 8 ,
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.Xr newfs 8 ,
Sort cross references.
1997-01-13 00:25:51 +00:00
.Xr tunefs 8
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.Sh HISTORY
The
.Nm
The .Nm utility
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utility appeared in
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.Bx 4.2 .
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