Copyright (c) 1980, 1989, 1993 The Regents of the University of California.
All rights reserved.
This code is derived from software contributed to Berkeley by
Christoph Herrmann and Thomas-Henning von Kamptz, Munich and Frankfurt.
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. All advertising materials mentioning features or use of this software
must display the following acknowledgment:
This product includes software developed by the University of
California, Berkeley and its contributors, as well as Christoph
Herrmann and Thomas-Henning von Kamptz.
4. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
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$TSHeader: src/sbin/growfs/growfs.8,v 1.3 2000/12/12 19:31:00 tomsoft Exp $
$FreeBSD: head/sbin/growfs/growfs.8 69926 2000-12-12 20:03:17Z tomsoft $
.Dd September 8, 2000 .Dt GROWFS 8 .Os BSD 4.4 .Sh NAME .Nm growfs .Nd grow size of an existing ufs file system .Sh SYNOPSIS .Nm growfs .Op Fl Ny .Op Fl s Ar size .Ar special .Sh DESCRIPTION .Nm extends the .Xr newfs 8 program. Before running .Nm the disk must be labeled to a bigger size using .Xr disklabel 8 . If you are using volumes you must grow them using .Xr vinum 8 . .Nm extends the size of the file system on the specified special file. Currently .Nm can only grow unmounted file systems. Do not try growing a mounted file system, your system may panic and you will not be able to use the file system any longer. Most of the options you have used with .Xr newfs 8 once can not be changed. In fact you can only increase the size of the file system. Use .Xr tunefs 8 for other changes.
p
The following options are available:
.Pp
l -tag -width indent t Fl N Cause the new file system parameters to be printed out without actually growing
the file system.
t Fl y .Dq Expert mode
Normally
.Nm
will ask you, if you took a backup of your data before and will do some tests
if
.Ar special
is currently mounted or if there are any active snapshots on the filesystem
specified.
This will be supressed.
So use this option with great care!
t Fl s Ar size The
.Ar size
of the file system after growing in sectors.
This value defaults to the size of the raw partition specified in
.Ar special
(in other words,
.Nm
will grow the file system to the size of the entire partition).
.El
.Sh EXAMPLES
p .Dl growfs -s 4194304 /dev/vinum/testvol
p will grow
a /dev/vinum/testvol up to 2GB if there is enough space in
a /dev/vinum/testvol . .Sh BUGS In some cases on x Free 3.x it is possible, that .Nm did not recognize exactly, if the file system is mounted or not and exits with an error message, then use .Nm .Fl y if you are sure, that the file system is not mounted. It is also recommended to always use .Xr fsck 8 after growing just to be on the safe side.
p Pay attention, as in certain cases we have to change the location of an file system internal structure which had never been moved before. Almost everything works perfect with this relocated structure except the .Xr fsck 8 utility. There is a patch available for .Xr fsck 8 ) . For growing above certain limits it is essential to have some free blocks available in the first cylinder group. To avoid the relocation of that structure it is currently recommended to use .Nm .Fl c Ar 0 on the first cylinder group and check that .Em nbfree in the CYLINDER SUMMARY (internal cs) of the CYLINDER GROUP .Em cgr0 has enough blocks. As a rule of thumb for default filesystem parameters a block is needed for every 2 GB of total filesystem size.
p
.Sh SEE ALSO
.Xr vinum 8 ,
.Xr disklabel 8 ,
.Xr fsck 8 ,
.Xr newfs 8 ,
.Xr tunefs 8 ,
.Xr dumpfs 8 ,
.Xr ffsinfo 8
.Rs
.Re
.Sh AUTHORS
.An Christoph Herrmann Aq chm@FreeBSD.ORG
.An Thomas-Henning von Kamptz Aq tomsoft@FreeBSD.ORG
.An The GROWFS team Aq growfs@Tomsoft.COM
.Sh HISTORY
The
.Nm
command first appeared first in
x Free 5.0.