.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
-.\" $Id: dump.8.in,v 1.4 1999/10/30 22:55:51 tiniou Exp $
+.\" $Id: dump.8.in,v 1.8 2000/01/07 19:24:04 tiniou Exp $
.\"
.Dd __DATE__
.Dt DUMP 8
.Nd ext2 filesystem backup
.Sh SYNOPSIS
.Nm dump
-.Op Fl 0123456789acknu
+.Op Fl 0123456789ackMnSu
.Op Fl B Ar records
.Op Fl b Ar blocksize
.Op Fl d Ar density
.Op Fl T Ar date
.Ar filesystem
.Nm dump
-.Op Fl 0123456789acknu
+.Op Fl 0123456789ackMnSu
.Op Fl B Ar records
.Op Fl b Ar blocksize
.Op Fl d Ar density
.Nm dump
to
copy all files new or modified since the
-last dump of the same or lower level.
+last dump of a lower level.
The default level is 9.
.It Fl B Ar records
The number of 1 KB blocks per volume.
to be at most LBLSIZE (currently 16) characters, which must include
the terminating
.Ql \e0 .
+.It Fl M
+Enable the multi-volume feature. The name specified with
+.Fl f
+is treated as a prefix and
+.Nm
+writes in sequence to <prefix>001, <prefix>002 etc. This can be
+useful when dumping to files on an ext2 partition, in order to bypass
+the 2GB file size limitation.
.It Fl n
Whenever
.Nm
It is recommended to be a bit conservative on this option.
The default tape length is 2300 feet.
.ne 1i
+.It Fl S
+Size estimate. Determine the amount of space
+that is needed to perform the dump without
+actually doing it, and display the estimated
+number of bytes it will take. This is useful
+with incremental dumps to determine how many
+volumes of media will be needed.
.It Fl T Ar date
Use the specified date as the starting time for the dump
instead of the time determined from looking in