Updated DVD-R[W] write mode description
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@ -54,6 +54,18 @@ Bus scan, burnfree, speed options, retrieving media info, padding, fifo.
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See section EXAMPLES at the end of this text.
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.PP
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.B General information paragraphs:
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Track recording model
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Recordable CD Media
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Sequentially Recordable DVD Media
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Overwriteable DVD Media
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Drive preparation and addressing
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.B Track recording model:
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The input-output entities which get processed are called tracks.
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@ -131,16 +143,9 @@ Newly purchased DVD-RW and DVD-R media are in this state.
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Used DVD-RW get into blank sequential state by option
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.B blank=deformat_sequential .
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Incremental Streaming is the default write mode if it is offered by the media.
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It may be selected explicitely by option
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.B -tao
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as it resembles much CD TAO by allowing track sources of
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unpredicted length and to keep media appendable by option
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.B -multi .
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The only restriction towards CD-R[W] is the lack of support for -audio tracks.
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Multiple tracks per session are permissible.
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Two write modes may be available:
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The other write mode, DAO, has many restrictions. It does not work with
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Mode DAO has many restrictions. It does not work with
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appendable media, allows no -multi and only a single track. The size of the
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track needs to be known in advance. So either its source has to be a disk file
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of recognizable size or the size has to be announced explicitely by options
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@ -148,12 +153,21 @@ of recognizable size or the size has to be announced explicitely by options
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or
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.B tao_to_sao_tsize= .
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DAO is the default mode for media which do not offer feature 21h Incremental
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Streaming. It may also be selected explicitely by option
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DAO is the only mode for media which do not offer feature 21h Incremental
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Streaming. DAO may also be selected explicitely by option
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.B -sao .
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Program growisofs uses DAO on sequential DVD-R[W] media for maximum
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DVD-ROM/-Video compatibility.
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The other mode, Incremental Streaming, is the default write mode if
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it is available and if the restrictions of DAO would prevent the job.
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Incremental Streaming may be selected explicitely by option
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.B -tao
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as it resembles much CD TAO by allowing track sources of
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unpredicted length and to keep media appendable by option
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.B -multi .
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The only restriction towards CD-R[W] is the lack of support for -audio tracks.
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Multiple tracks per session are permissible.
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.PP
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.B Overwriteable DVD Media:
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@ -184,7 +198,9 @@ by a run of \fBcdrskin --devices\fP.
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On Linux, they are device files which traditionally do not offer
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w-permissions for normal users. Because libburn needs rw-permission,
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it might be only the superuser who is able to get this list without further
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it might be only the
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.B superuser
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who is able to get this list without further
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precautions.
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It is consensus that \fBchmod a+rw /dev/sg0\fP or \fBchmod a+rw /dev/hdc\fP
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