GROWFS(8) | System Manager's Manual | GROWFS(8) |
NAME¶
growfs
— expand an
existing UFS file system
SYNOPSIS¶
growfs |
[-Ny ] [-s
size] special |
filesystem |
DESCRIPTION¶
The growfs
utility makes it possible to
expand an UFS file system. Before running growfs
the
partition or slice containing the file system must be extended using
gpart(8). If you are using volumes you must enlarge them
by using gvinum(8). The growfs
utility extends the size of the file system on the specified special file.
The following options are available:
-N
- “Test mode”. Causes the new file system parameters to be printed out without actually enlarging the file system.
-y
- “Expert mode”. Usually
growfs
will ask you if you took a backup of your data before and will do some tests whether special is currently mounted or whether there are any active snapshots on the file system specified. This will be suppressed. So use this option with great care! -s
size- Determines the size of the file system after
enlarging in sectors. Size is the number of 512 byte
sectors unless suffixed with a
b
,k
,m
,g
, ort
which denotes byte, kilobyte, megabyte, gigabyte and terabyte respectively. 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).
EXAMPLES¶
growfs -s 2G /dev/ada0p1
will enlarge /dev/ada0p1 up to 2GB if there is enough space in /dev/ada0p1.
SEE ALSO¶
dumpfs(8), ffsinfo(8), fsck(8), fsdb(8), gpart(8), newfs(8), tunefs(8)
HISTORY¶
The growfs
utility first appeared in
FreeBSD 4.4. The ability to resize mounted
filesystems was added in FreeBSD 10.0.
AUTHORS¶
Christoph Herrmann
⟨chm@FreeBSD.org⟩
Thomas-Henning von Kamptz
⟨tomsoft@FreeBSD.org⟩
The GROWFS team ⟨growfs@Tomsoft.COM⟩
Edward Tomasz Napierala
⟨trasz@FreeBSD.org⟩
CAVEATS¶
When expanding a file system mounted read-write, any writes to that file system will be temporarily suspended until the expansion is finished.
BUGS¶
Normally growfs
writes cylinder group
summary to disk and reads it again later for doing more updates. This read
operation will provide unexpected data when using
-N
. Therefore, this part cannot really be simulated
and will be skipped in test mode.
April 30, 2012 | Debian |