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authorJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-25 19:55:15 -0400
committerJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-25 19:55:15 -0400
commit253e67c8b3a72b3a4757fdbc5845297628db0a4a (patch)
treeadf53b66087aa30dfbf8bf391a1dadb044c3bf4d /static/netbsd/man8/dumpfs.8
parenta9157ce950dfe2fc30795d43b9d79b9d1bffc48b (diff)
docs: Added All NetBSD Manuals
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+.\" $NetBSD: dumpfs.8,v 1.21 2022/12/19 18:51:42 chs Exp $
+.\"
+.\" 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.
+.\" 3. Neither the name of the University nor the names of its contributors
+.\" 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
+.\"
+.Dd February 27, 2010
+.Dt DUMPFS 8
+.Os
+.Sh NAME
+.Nm dumpfs
+.Nd dump file system information
+.Sh SYNOPSIS
+.Nm
+.Op Fl acFijmsv
+.Ar filesys No \&| Ar device
+.Op Ar ...
+.Sh DESCRIPTION
+.Nm
+prints out detailed information about the specified filesystems.
+.Pp
+Options:
+.Bl -tag -width Ds
+.It Fl a
+Print details from each alternate superblock.
+.It Fl c
+Print details of each cylinder group.
+.It Fl F
+Dump a file system image from a file, not a special device.
+.It Fl i
+Print details of each allocated inode.
+.It Fl j
+Print details of the WAPBL journal.
+.It Fl m
+Print details of the cylinder group summary.
+.It Fl s
+Print details of the superblock.
+.It Fl v
+Be even more verbose.
+.El
+.Pp
+If none of
+.Fl a ,
+.Fl c ,
+.Fl i ,
+.Fl j ,
+.Fl m ,
+or
+.Fl s
+are given, then
+.Nm
+defaults to
+.Fl cmsv .
+.Pp
+.Nm
+is useful mostly for finding out certain file system
+information such as the file system block size, minimum
+free space percentage, and (for FFSv1) the file system level that
+can be upgraded with the
+.Fl c
+option of
+.Xr fsck_ffs 8 .
+All of this information is output by
+.Nm
+.Fl s .
+.Sh SEE ALSO
+.Xr disktab 5 ,
+.Xr fs 5 ,
+.Xr disklabel 8 ,
+.Xr fsck 8 ,
+.Xr fsck_ffs 8 ,
+.Xr newfs 8 ,
+.Xr tunefs 8
+.Sh HISTORY
+The
+.Nm
+command appeared in
+.Bx 4.2 .
+The
+.Fl a ,
+.Fl c ,
+.Fl i ,
+.Fl m ,
+and
+.Fl s
+options, and the inode dump were added for
+.Nx 2.0 .
+The
+.Fl j ,
+option was added for
+.Nx 6.0 .