1.\" Copyright (c) 2000 Christoph Herrmann, Thomas-Henning von Kamptz 2.\" Copyright (c) 1980, 1989, 1993 The Regents of the University of California. 3.\" All rights reserved. 4.\" 5.\" This code is derived from software contributed to Berkeley by 6.\" Christoph Herrmann and Thomas-Henning von Kamptz, Munich and Frankfurt. 7.\" 8.\" Redistribution and use in source and binary forms, with or without 9.\" modification, are permitted provided that the following conditions 10.\" are met: 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 2. Redistributions in binary form must reproduce the above copyright 14.\" notice, this list of conditions and the following disclaimer in the 15.\" documentation and/or other materials provided with the distribution. 16.\" 3. All advertising materials mentioning features or use of this software 17.\" must display the following acknowledgment: 18.\" This product includes software developed by the University of 19.\" California, Berkeley and its contributors, as well as Christoph 20.\" Herrmann and Thomas-Henning von Kamptz. 21.\" 4. Neither the name of the University nor the names of its contributors 22.\" may be used to endorse or promote products derived from this software 23.\" without specific prior written permission. 24.\" 25.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35.\" SUCH DAMAGE. 36.\" 37.\" $TSHeader: src/sbin/growfs/growfs.8,v 1.3 2000/12/12 19:31:00 tomsoft Exp $ 38.\" $FreeBSD$ 39.\" 40.Dd November 20, 2014 41.Dt GROWFS 8 42.Os 43.Sh NAME 44.Nm growfs 45.Nd expand an existing UFS file system 46.Sh SYNOPSIS 47.Nm 48.Op Fl Ny 49.Op Fl s Ar size 50.Ar special | filesystem 51.Sh DESCRIPTION 52The 53.Nm 54utility makes it possible to expand an UFS file system. 55Before running 56.Nm 57the partition or slice containing the file system must be extended using 58.Xr gpart 8 . 59If you are using volumes you must enlarge them by using 60.Xr gvinum 8 . 61The 62.Nm 63utility extends the size of the file system on the specified special file. 64The following options are available: 65.Bl -tag -width indent 66.It Fl N 67.Dq Test mode . 68Causes the new file system parameters to be printed out without actually 69enlarging the file system. 70.It Fl y 71.Dq Expert mode . 72Usually 73.Nm 74will ask you if you took a backup of your data before and will do some tests 75whether 76.Ar special 77is currently mounted or whether there are any active snapshots on the file 78system specified. 79This will be suppressed. 80So use this option with great care! 81.It Fl s Ar size 82Determines the 83.Ar size 84of the file system after enlarging in sectors. 85.Ar Size 86is the number of 512 byte sectors unless suffixed with a 87.Cm b , k , m , g , 88or 89.Cm t 90which 91denotes byte, kilobyte, megabyte, gigabyte and terabyte respectively. 92This value defaults to the size of the raw partition specified in 93.Ar special 94(in other words, 95.Nm 96will enlarge the file system to the size of the entire partition). 97.El 98.Sh EXAMPLES 99Expand root file system to fill up available space: 100.Dl growfs / 101.Pp 102Resize 103.Pa /dev/ada0p1 104partition to 2GB and expand the file system: 105.Dl gpart resize -i 1 -s 2G ada0 106.Dl growfs -s 2G /dev/ada0p1 107.Sh SEE ALSO 108.Xr dumpfs 8 , 109.Xr ffsinfo 8 , 110.Xr fsck 8 , 111.Xr fsdb 8 , 112.Xr gpart 8 , 113.Xr newfs 8 , 114.Xr tunefs 8 115.Sh HISTORY 116The 117.Nm 118utility first appeared in 119.Fx 4.4 . 120The ability to resize mounted file systems was added in 121.Fx 10.0 . 122.Sh AUTHORS 123.An Christoph Herrmann Aq Mt chm@FreeBSD.org 124.An Thomas-Henning von Kamptz Aq Mt tomsoft@FreeBSD.org 125.An The GROWFS team Aq Mt growfs@Tomsoft.COM 126.An Edward Tomasz Napierala Aq Mt trasz@FreeBSD.org 127.Sh CAVEATS 128When expanding a file system mounted read-write, any writes to that file system 129will be temporarily suspended until the expansion is finished. 130.Sh BUGS 131Normally 132.Nm 133writes cylinder group summary to disk and reads it again later for doing more 134updates. 135This read operation will provide unexpected data when using 136.Fl N . 137Therefore, this part cannot really be simulated and will be skipped in test 138mode. 139