'\" te
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.TH GROWFS 8 "Apr 20, 2009"
.SH NAME
growfs \- non-destructively expand a UFS file system
.SH SYNOPSIS
.LP
.nf
\fB/usr/sbin/growfs\fR [\fB-M\fR \fImount-point\fR] [\fInewfs-options\fR]
     [\fIraw-device\fR]
.fi

.SH DESCRIPTION
.LP
\fBgrowfs\fR non-destructively expands a mounted or unmounted UNIX file system
(UFS) to the size of the file system's slice(s).
.sp
.LP
Typically, disk space is expanded by first adding a slice to a metadevice, then
running the \fBgrowfs\fR command. When adding space to a mirror, you expand
each submirror before expanding the file system.
.sp
.LP
\fBgrowfs\fR will ``write-lock'' (see \fBlockfs\fR(8)) a mounted file system
when expanding. The length of time the file system is write-locked can be
shortened by expanding the file system in stages. For instance, to expand a 1
Gbyte file system to 2 Gbytes, the file system can be grown in 16 Mbyte stages
using the \fB-s\fR option to specify the total size of the new file system at
each stage. The argument for \fB-s\fR is the number of sectors, and must be a
multiple of the cylinder size. Note: The file system cannot be grown if a
cylinder size of less than 2 is specified. Refer to the \fBnewfs\fR(8) man
page for information on the options available when growing a file system.
.sp
.LP
\fBgrowfs\fR displays the same information as \fBmkfs\fR during the expansion
of the file system.
.sp
.LP
If \fBgrowfs\fR is aborted, recover any lost free space by unmounting the file
system and running the \fBfsck\fR command, or run the \fBgrowfs\fR command
again.
.sp
.LP
\fBNote:\fR If \fBgrowfs\fR is aborted and the file system is used before
\fBfsck\fR is run on it, UFS metadata might be left in an incomplete state,
with the result that the file system would be corrupted. In such a
circumstance, you would have to restore the file system from backups.
.SH OPTIONS
.LP
Root privileges are required for all of the following options.
.sp
.ne 2
.na
\fB\fB-M\fR \fImount-point\fR\fR
.ad
.RS 18n
The file system to be expanded is mounted on \fImount-point\fR. File system
locking (\fBlockfs\fR) will be used.
.RE

.sp
.ne 2
.na
\fB\fInewfs-options\fR\fR
.ad
.RS 18n
The options are documented in the \fBnewfs\fR man page.
.RE

.sp
.ne 2
.na
\fB\fIraw-device\fR\fR
.ad
.RS 18n
Specifies the name of a raw metadevice or raw special device, residing in
\fB/dev/md/rdsk\fR, or \fB/dev/rdsk\fR, respectively, including the disk slice,
where you want the file system to be grown.
.RE

.SH EXIT STATUS
.LP
The following exit values are returned:
.sp
.ne 2
.na
\fB\fB0\fR\fR
.ad
.RS 6n
Successful completion.
.RE

.sp
.ne 2
.na
\fB\fB>0\fR\fR
.ad
.RS 6n
An error occurred.
.RE

.SH SEE ALSO
.LP
.BR attributes (7),
.BR fsck (8),
.BR lockfs (8),
.BR mkfs (8),
.BR newfs (8)
.SH LIMITATIONS
.LP
Only UFS file systems (either mounted or unmounted) can be expanded using the
\fBgrowfs\fR command. Once a file system is expanded, it cannot be decreased in
size. The following conditions prevent you from expanding file systems: When
\fBacct\fR is activated and the accounting file is on the target device. When
C2 security is activated and the logging file is on the target file system.
When there is a local \fBswap\fR file in the target file system. When the file
system is root (\fB/\fR), \fB/usr\fR, or \fBswap\fR.