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Clarified CD and DVD peculiarities

ZeroThreeEight
Thomas Schmitt 16 years ago
parent
commit
d2283a5b4e
  1. 117
      cdrskin/cdrskin.1

117
cdrskin/cdrskin.1

@ -125,10 +125,7 @@ Multiple cycles of blanking and overwriting with random numbers might be.
---------------
.br
Note: The support for sequentially recordable media is still emerging.
.br
DVD-R have not been tested yet. If no Incremental Streaming feature (21h)
is offered, then the media is regarded as unsuitable without further
explanation. (One can torture DVD-RW to make them offer only DAO (2Fh)).
DVD-R have not been tested yet.
.br
---------------
.br
@ -139,16 +136,28 @@ Used DVD-RW get into blank sequential state by option
.B blank=deformat_sequential .
.br
Incremental Streaming is the default write mode if it is offered by the media.
It may be selected explicitely by option -tao as it resembles much TAO writing
with CD by allowing track sources of unpredicted length and to keep media
appendable by option
It may be selected explicitely by option
.B -tao
as it resembles much CD TAO by allowing track sources of
unpredicted length and to keep media appendable by option
.B -multi .
Only restriction towards CD-RW is the lack of support for -audio tracks.
The only restriction towards CD-R[W] is the lack of support for -audio tracks.
Multiple tracks per session are permissible.
.br
(The other write mode, DAO, is not implemented yet. It will allow no -multi and
only a single track. It will be selected explicitely by option -sao or by
default if no Incremental writing is available.)
The other write mode, DAO, has many restrictions. It does not work with
appendable media, allows no -multi and only a single track. The size of the
track needs to be known in advance. So either its source has to be a disk file
of recognizable size or the size has to be announced explicitely by options
.B tsize=
or
.B tao_to_sao_tsize= .
.br
DAO is the default mode for media which do not offer feature 21h Incremental
Streaming. It may also be selected explicitely by option
.B -sao .
.br
Program growisofs uses DAO on sequential DVD-R[W] media for maximum
DVD-ROM/-Video compatibility.
.PP
.B Overwriteable DVD Media:
.br
@ -233,7 +242,7 @@ audio track. Same is done for suffix .au and SUN Audio.
Option -audio may be used only with CD media and not with DVD.
.TP
.BI blank= type
Blank a CD-RW or format a DVD+/-RW.
Blank a CD-RW, a DVD-RW, or format a DVD+/-RW.
This is combinable with burning in the same run of cdrskin.
The type given with blank= selects the particular behavior:
.RS
@ -245,7 +254,7 @@ all
Blank an entire CD-RW or an unformatted DVD-RW.
.TP
fast
Minimally blank an entire CD-RW or an unformatted DVD-RW.
Minimally blank an entire CD-RW or fully blank an unformatted DVD-RW.
.TP
format_overwrite
Format a DVD-RW to "Restricted Overwrite". The user should bring some patience.
@ -273,7 +282,12 @@ deformat_sequential
Like blank=all but with the additional ability to blank overwriteable DVD-RW.
This will destroy their formatting and make them sequentially recordable.
.br
(Note: blank=deformat_sequential is not an original cdrecord option.)
(Note: blank=deformat_sequential* are not original cdrecord options.)
.TP
deformat_sequential_quickest
Like blank=deformat_sequential but blanking DVD-RW only minimally.
This is faster than full blanking but may yield media incapable of
Incremental Streaming (-tao).
.RE
.TP
.BI \-checkdrive
@ -281,7 +295,8 @@ Retrieve some info about the addressed drive.
Exits with non-zero value if the drive cannot be found and opened.
.TP
.BI \-dao
Alias for option -sao. Write disc in Session at Once mode.
Alias for option -sao. Write CD in Session at Once mode
or DVD-R[W] in Disc-at-once mode.
.TP
.BI \-data
Subsequent tracks are data tracks. This option is default and only needed
@ -311,8 +326,8 @@ even if attempted explicitely via "driveropts=burnfree".
.TP
.BI \-dummy
Try to perform the drive operations without actually affecting the inserted
media. There is no guarantee that this will work with a particular drive
in a particular write mode. Blanking is prevented reliably, though.
media. There is no guarantee that this will work with a particular combination
of drive, media, and write mode. Blanking is prevented reliably, though.
.TP
.BI \-eject
Eject the disc after work is done.
@ -365,12 +380,13 @@ start address of the next session to be appended. The string is empty if
the most recent session was not written with option -multi.
.TP
.BI \-multi
This option keeps the CD or DVD-R[W] appendable after the current session has
been written.
This option keeps the CD or unformatted DVD-R[W] appendable after the current
session has been written.
Without it the disc gets closed and may not be written any more - unless it
is a -RW and gets blanked which causes loss of its content.
.br
The following sessions can only be written in -tao mode.
The following sessions can only be written in -tao mode. -multi is prohibited
with overwriteable DVD media and with DVD-R[W] DAO write mode.
.br
In order to have all filesystem content accessible, the eventual ISO-9660
filesystem of a follow-up
@ -403,11 +419,20 @@ then behave strange or even go bad for the next few attempts to burn a CD.
One should use it only if inavoidable.
.TP
.BI \-sao
Write disc in Session At Once mode. This mode is able to put several audio
tracks on CD without producing audible gaps between them. It can only
be used for tracks of fixely predicted size. This implies that track arguments
which depict stdin or named pipes need to be preceeded by option tsize= or
by option tao_to_sao_tsize=.
Write CD in Session At Once mode, resp. a sequential DVD-R[W] in Disc-at-once
(DAO) mode.
.br
With CD this mode is able to put several audio tracks on media without
producing audible gaps between them.
.br
With DVD-R[W] this mode can only write a single track.
No -multi is allowed with DVD-R[W] -sao.
.br
-sao can only be used for tracks of fixely predicted size. This implies that
track arguments which depict stdin or named pipes need to be preceeded by
option tsize= or by option tao_to_sao_tsize=.
.br
-sao cannot be used on appendable media.
.TP
.BI \-scanbus
Scan the system for drives. On Linux the drives at /dev/s* and at /dev/hd*
@ -437,10 +462,13 @@ Less guesswork is needed if track sources are in format MS-WAVE in a file with
suffix ".wav".
.TP
.BI \-tao
Write disc in Track At Once (TAO) mode. This mode can be used with track
sources of unpredictable size, like standard input or named pipes. It is
also the only mode that can be used for writing to appendable CD or DVD-R[W]
which already hold data.
Write CD in Track At Once (TAO) mode, resp. sequential DVD-R[W] in Incremental
Streaming mode. This mode also applies pro-forma to overwriteable DVD media.
.br
Mode -tao can be used with track sources of unpredictable size, like standard
input or named pipes. It is also the only mode that can be used for writing
to appendable media which already hold data. With unformatted DVD-R[W] it is
the only mode which allows -multi.
.TP
.BI \-toc
Print the table of content (TOC) which describes the tracks recorded on disc.
@ -476,7 +504,7 @@ About size specifiers, see option fs=.
If the track source does not deliver the predicted amount of bytes, the
remainder of the track is padded with zeros. This is not considered an error.
If on the other hand the track source delivers more than the announced bytes
then the track on CD gets truncated to the predicted size and cdrskin exits
then the track on media gets truncated to the predicted size and cdrskin exits
with non-zero value.
.TP
.BI \-v
@ -538,6 +566,19 @@ interpretation of eventual startup files. See section FILES below.
.TP
.BI \--single_track
Accept only the last argument of the command line as track source address.
.TP
.BI tao_to_sao_tsize= size
Set an exact fixed size for the next track to be in effect only if the track
source cannot deliver a size prediction and no tsize= was specified and an
exact track size prediction is demanded by the write mode.
.br
This was the fallback from bad old times when cdrskin was unable to burn
in mode -tao . It came back with minimally blanked DVD-RW which allow no
Incremental Streaming (-tao) resp. with explicitly selected write mode -sao
for best DVD-ROM compatibility.
.br
If the track source delivers less bytes than announced then the missing ones
will be filled with zeros.
.TP
.BI write_start_address= byte_offset
Set the address on media where to start writing the track. With DVD+RW or
@ -607,8 +648,8 @@ On signals exit even if the drive is in busy state. This is not a very good
idea. You might end up with a stuck drive that refuses to hand out the media.
.TP
.BI \--no_blank_appendable
Refuse to blank appendable CD-RW. This is a feature that was once builtin with
libburn. No information available for what use case it was needed.
Refuse to blank appendable CD-RW or DVD-RW. This is a feature that was once
builtin with libburn. No information available for what use case it was needed.
.TP
.BI \--no_convert_fs_adr
Do only literal translations of dev=. This prevents cdrskin from test-opening
@ -625,12 +666,6 @@ Linux specific:
Use and report literal Bus,Target,Lun addresses rather than real SCSI and
pseudo ATA addresses. This method is outdated and was never compatible with
original cdrecord.
.TP
.BI tao_to_sao_tsize= size
Set an exact fixed size for the next track to be in effect only if the track
source cannot deliver a size prediction and no tsize= was specified.
This is the fallback from bad old times when cdrskin was unable to burn
in mode -tao.
.br
.SH EXAMPLES
.SS
@ -664,7 +699,7 @@ cdrskin -v dev=/dev/sr0 blank=format_overwrite
.br
cdrskin -v dev=/dev/sr0 blank=deformat_sequential
.SS
.B Write ISO-9660 filesystem image:
.B Write ISO-9660 filesystem image as only one to blank or formatted media:
.br
cdrskin -v dev=/dev/hdc speed=12 fs=8m \\
.br
@ -676,11 +711,11 @@ find . | afio -oZ - | \\
.br
cdrskin -v dev=0,1,0 fs=32m speed=8 \\
.br
padsize=300k -tao -
-tao padsize=300k -
.SS
.B Write several sessions to the same CD or DVD-R[W]:
.br
cdrskin dev=/dev/hdc -v padsize=300k -multi 1.iso
cdrskin dev=/dev/hdc -v padsize=300k -multi -tao 1.iso
.br
cdrskin dev=/dev/hdc -v padsize=300k -multi -tao 2.iso
.br

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