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.\" Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
.TH fssnap 8 "11 Aug 2004" "Oracle Solaris 11.4" "System Administration Commands"
.SH NAME
fssnap \- create temporary snapshots of a file system
.SH SYNOPSIS

.LP
.nf
\fBfssnap\fR [\fB-F\fR \fIFSType\fR] [\fB-V\fR] \fB-o\fR \fIspecial_options\fR \fI/mount/point\fR
.fi

.LP
.nf
\fBfssnap \fR \fB-d\fR [\fB-F\fR \fI FSType\fR] [\fB-V\fR] \fI/mount/point\fR | \fIdev\fR
.fi

.LP
.nf
\fBfssnap\fR \fB-i\fR [\fB-F\fR \fIFSType\fR] [\fB-V\fR] [\fB-o\fR \fIspecial_options\fR] 
     [\fI/mount/point\fR | \fIdev\fR]
.fi
.SH DESCRIPTION
.sp
.LP
The \fBfssnap\fR command creates a stable, read-only snapshot of a file system when given either an active mount point or a special device containing a mounted file system, as in the first form of the synopsis. A snapshot is a temporary image of a file system intended for backup operations. 
.sp
.LP
While the snapshot file system is stable and consistent, an application updating files when the snapshot is created might leave these files in an internally inconsistent, truncated, or otherwise unusable state. In such a case, the snapshot will contain these partially written or corrupted files. It is a good idea to ensure active applications are suspended or checkpointed and their associated files are also consistent during snapshot creation.
.sp
.LP
File access times are not updated while the snapshot is being created.
.sp
.LP
A path to the virtual device that contains this snapshot is printed to standard output when a snapshot is created.
.SH OPTIONS
.sp
.LP
The following options are supported:
.sp
.ne 2
.mk
.na
\fB\fB-d\fR\fR
.ad
.RS 22n
.rt
Deletes the snapshot associated with the given file system.
.RE

.sp
.ne 2
.mk
.na
\fB\fB-F\fR \fIFSType\fR\fR
.ad
.RS 22n
.rt
Specifies the file system type to be used. The \fBFSType\fR should either be specified here or be determined by matching the block special device with an entry in the \fB/etc/vfstab\fR table, or by consulting \fB/etc/default/fs\fR.
.RE

.sp
.ne 2
.mk
.na
\fB\fB-i\fR\fR
.ad
.RS 22n
.rt
Displays the state of any given \fBFSType\fR snapshot. If a mount-point or device is not given, a list of all snapshots on the system is displayed. When a mount-point or device is specified, detailed information is provided for the specified file system snapshot by default. The format and meaning of this information is file-system dependent. See the \fBFSType\fR-specific \fBfssnap\fR man page for details.
.RE

.sp
.ne 2
.mk
.na
\fB\fB-o\fR \fIspecial_options\fR\fR
.ad
.RS 22n
.rt
See the \fBFSType\fR-specific man page for \fBfssnap\fR.
.RE

.sp
.ne 2
.mk
.na
\fB\fB-V\fR\fR
.ad
.RS 22n
.rt
Echoes the complete command line, but does not execute the command.
.RE

.SH OPERANDS
.sp
.LP
The following operands are supported:
.sp
.ne 2
.mk
.na
\fB\fI/mount/point\fR\fR
.ad
.RS 16n
.rt
The directory where the file system resides.
.RE

.SH EXAMPLES
.sp
.LP
See \fBFSType\fR-specific man pages for examples.
.SH EXIT STATUS
.sp
.LP
The following exit values are returned:
.sp
.ne 2
.mk
.na
\fB\fB0\fR\fR
.ad
.RS 6n
.rt
Successful completion. 
.RE

.sp
.ne 2
.mk
.na
\fB>\fB0\fR\fR
.ad
.RS 6n
.rt
An error occurred.
.RE

.SH FILES
.sp
.ne 2
.mk
.na
\fB\fB/etc/vfstab\fR\fR
.ad
.RS 19n
.rt
Specifies file system type.
.RE

.sp
.ne 2
.mk
.na
\fB\fB/etc/default/fs\fR\fR
.ad
.RS 19n
.rt
Specifies the default local file system type.
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp
.TS
tab(
) box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPE
ATTRIBUTE VALUE
_
Availability
system/core-os
.TE
.sp
.SH SEE ALSO
.sp
.LP
\fBattributes\fR(7), \fBfssnap_ufs\fR(8)
.SH NOTES
.sp
.LP
This command might not be supported for all \fBFSTypes\fR.