grow size of an existing ffs file system
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 special file.
growfs can only enlarge
unmounted file systems. Do not try enlarging 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
growfs. In fact, you can only increase
the size of the file system. Use
tunefs(8) for other changes.
The following options are available:
- Test mode. Causes the new file system parameters to be printed out without
actually enlarging the file system.
- Operate in quiet mode. With this option,
will not print extraneous information like superblock backups.
- Determines the size of the file system after
enlarging in sectors. 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).
- 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
- If set to a positive integer, output is formatted to the given width in
growfs defaults to the
terminal width, or 80 columns if the output is not a terminal.
growfs utility first appeared in
FreeBSD 4.4 and has been available since
Filesystems must be checked with fsck(8) after