GROWFS(8)               OpenBSD System Manager's Manual              GROWFS(8)

NAME
     growfs - grow size of an existing ffs file system

SYNOPSIS
     growfs [-Nqy] [-s size] special

DESCRIPTION
     The growfs utility extends the newfs(8) program.  Before starting growfs,
     the partition must be set to a larger size using disklabel(8).  The
     growfs utility extends the size of the file system on the specified spe-
     cial file.

     Currently growfs can only enlarge unmounted file systems.  Do not try en-
     larging a mounted file system - your system may panic and you will not be
     able to use the file system any longer.  Most of the newfs(8) options
     cannot be changed by growfs.  In fact, you can only increase the size of
     the file system.  Use tunefs(8) for other changes.

     The following options are available:

     -N         Test mode.  Causes the new file system parameters to be print-
                ed out without actually enlarging the file system.

     -q         Operate in quiet mode.  With this option, growfs will not
                print extraneous information like superblock backups.

     -s size    Determines the size of the file system after enlarging in sec-
                tors.  This value defaults to the size of the raw partition
                specified in special (in other words, growfs will enlarge the
                file system to the size of the entire partition).

     -y         Expert mode.  Usually growfs will ask you if you have taken a
                backup of your data and will test whether special is currently
                mounted.  The -y flag suppresses this, so use this option with
                great care!

SEE ALSO
     disklabel(8), dumpfs(8), fdisk(8), fsck(8), newfs(8), tunefs(8)

HISTORY
     The growfs utility first appeared in FreeBSD 4.4.

AUTHORS
     Christoph Herrmann <chm@FreeBSD.org>
     Thomas-Henning von Kamptz <tomsoft@FreeBSD.org>
     The GROWFS team <growfs@Tomsoft.COM>

BUGS
     Filesystems must be checked with fsck(8) after enlarging.

OpenBSD 4.7                    November 28, 2008                             1
