1.\" $NetBSD: dumpfs.8,v 1.18 2004/01/03 21:05:21 wiz Exp $ 2.\" 3.\" Copyright (c) 1983, 1991, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" @(#)dumpfs.8 8.1 (Berkeley) 6/5/93 31.\" 32.Dd January 3, 2004 33.Dt DUMPFS 8 34.Os 35.Sh NAME 36.Nm dumpfs 37.Nd dump file system information 38.Sh SYNOPSIS 39.Nm 40.Op Fl acFimsv 41.Ar filesys No \&| Ar device 42.Op Ar ... 43.Sh DESCRIPTION 44.Nm 45prints out detailed information about the specified filesystems. 46.Pp 47Options: 48.Bl -tag -width Ds 49.It Fl a 50Print details from each alternate superblock. 51.It Fl c 52Print details of each cylinder group. 53.It Fl F 54Dump a file system image from a file, not a special device. 55.It Fl i 56Print details of each allocated inode. 57.It Fl m 58Print details of the cylinder group summary. 59.It Fl s 60Print details of the superblock. 61.It Fl v 62Be even more verbose. 63.El 64.Pp 65If none of 66.Fl a , 67.Fl c , 68.Fl i , 69.Fl m , 70or 71.Fl s 72are given, then 73.Nm 74defaults to 75.Fl cmsv . 76.Pp 77.Nm 78is useful mostly for finding out certain file system 79information such as the file system block size, minimum 80free space percentage, and the file system level that 81can be upgraded with the 82.Fl c 83option of 84.Xr fsck_ffs 8 . 85All of this information is output by 86.Nm 87.Fl s . 88.Sh SEE ALSO 89.Xr disktab 5 , 90.Xr fs 5 , 91.Xr disklabel 8 , 92.Xr fsck 8 , 93.Xr fsck_ffs 8 , 94.Xr newfs 8 , 95.Xr tunefs 8 96.Sh HISTORY 97The 98.Nm 99command appeared in 100.Bx 4.2 . 101The 102.Fl a , 103.Fl c , 104.Fl i , 105.Fl m , 106and 107.Fl s 108options, and the inode dump were added for 109.Nx 2.0 . 110