SYNOPSIS
dvdtape --inputfile=file [options]...
DESCRIPTION
dvdtape should be used to write directly to a Digital Linear Tape to
send to a DVD factory for manufacturing. It writes all of the extra
data that the factory needs in just the format that is expected. This
includes ANSI tape headers, DDP information, DDPMS information, "lead
in", and the DVD data itself.
--combined-length=length
When producing the first layer of a two layer opposite spiral
track DVD, the dvdtape needs to know the combined length of both
layers to record the length of the second layer in the leadin
area of the first layer (opposite track DVD's only have one
leadin area for both tracks). This parameter provides a way to
specify that value. If this value is not specified and is
needed, it is inferred from the image contents, based on the
assumption that the data being written is a "fat" ISO-9660 file
system.
--controlfile=file
The file from which the DVD leadin data should be read. The DVD
leadin data is normally 32,768 bytes of data that contains
information about the physical layout of the DVD-ROM, such as
the number of layers, number of sides, and so on. This informa-
tion does not appear as data sectors to programs reading the
DVD-ROM, but is used internally by the DVD-ROM drive. If this
parameter is not specified, dvdtape will attempt to create its
own leadin data by a possibly incorrect algorithm written from
experiments on a proprietary program that creates leadin data.
Note also that leadin deliberately omitted for the second layer
of an oppositely oriented dvd track.
--diameter=8cm or --diameter=12cm
The physical diameter of the disc being made. 12 centimeters is
the default.
--inputfile=file
The file from which the DVD contents should be read. This file
usually contains an ISO-9660 or UDF file system. This parameter
is mandatory. It has no default value.
--layer=0 or --layer=1
The layer number being written. The 4.7 gigabyte first layer is
layer 0. The optional 3.7 gigabyte second layer is layer 1.
Note that you must create a separate physical tape for each
layer. (DLT tapes have enough space to hold both layers, but
the standard specifies two tapes.) The default is layer=0.
--layers=1 or --layers=2
The total number of layers that the finished disc will comprise.
--master-id=string
Set the master ID to the specified string, which can be up to 48
characters in length. This string is a field in the tape header
information, which sometimes displayed on the operator's console
when the disc is being made. It is useful for identifying tapes
at the factor, and apparently has no other purpose.
--offset=NNNNNNNN
Skip this many bytes before starting to read the DVD image.
This is usually used for continuing a file system image on a
second layer. The default offset is 0 if layer=0 and 4699979776
(the size of layer 0) if layer=1.
--outputfile=tape_device
Write the output to tape_device. You can write the output to a
plain file, but the size of the tape blocks are 128 bytes in
some sections and 32768 bytes in others, so you cannot write a
proper tape later by simplying copying that file to a tape
device. The default is /dev/st0.
--owner=string
Fill in the "owner" field in the tape. This option appears to
be useful only if you want some specific information to appear
before the operator who is running the disc manufacturing equip-
ment. The default is an empty string.
--readout-speed=2 or --readout-speed=5 or --readout-speed=10
The leadin data contains a parameter that specifies a minimum
required readout speed for the DVD-ROM. It can be 2.52, 5.04 or
10.08 megabits per second, which you can select by setting this
argument to 2, 5, or 10, respectively. The default is 2.52
megabits per second. As far as this author can tell, there does
not appear to be a way in the leadin format to specify no mini-
mum readout speed. This argument is only used when dvdtape gen-
erates its own leadin data.
--side=0 or --side=1
The side number being written. The first side is side 0. Note
that you must create a separate physical tape for each side.
(DLT tapes have enough space to hold both sides, but the stan-
dard is two tapes.) The default value is 0.
--sides=1 or --sides=2
The total number of sides that the finished disc will comprise.
The tape itself only contains information about one side, but
the total number of sides is stored in the header information on
each tape. The default value is 1.
--track-path=directionfR
The direction of translation of the second layer in the DVD.
This argument should have no effect for a single layer DVD,
EXAMPLES
dvdtape --inputfile=mydvd.iso-image
Writes layer 0 to the tape on /dev/st0.
dvdtape --inputfile=mydvd.iso-image --side=1
Writes layer 1 to the tape on /dev/st0. You only need to do
this for an image that is too large to fit on one layer.
COPYRIGHT
Copyright 1999, 2000 Yggdrasil Computing, Inc. dvdtape may be copied
under the terms and conditions of version 2 of the GNU General Public
License, as published by the Free Software Foundation (Cambridge, MA,
USA).
AUTHOR
Written by Adam J. Richter (adam@yggdrasil.com)
Yggdrasil DVD Tools February 2000 DVDTAPE(1)
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