Updated about overwriteable DVD and pointer to dvd+rw-tools

ZeroThreeEight
Thomas Schmitt 16 years ago
parent 9180a0036d
commit 36d475eaf9

@ -7,8 +7,9 @@
Its paragon, cdrecord, is a powerful GPL'ed burn program included in Joerg
Schilling's cdrtools. cdrskin strives to be a second source for the services
traditionally provided by cdrecord. Currently it does CD-R and CD-RW.
Its future ability to burn DVD media depends on the development of libburn.
traditionally provided by cdrecord. Currently it does CD-R and CD-RW this way.
Overwriteable media DVD-RAM, DVD+RW and DVD-RW are handled differently than
with cdrecord-ProDVD in order to offer TAO-like single track recording.
cdrskin does not contain any bytes copied from cdrecord's sources.
Many bytes have been copied from the message output of cdrecord
@ -23,10 +24,9 @@ Appending sessions to an unclosed CD is restricted to write mode TAO.
(Users who have a burner which succeeds with a follow-up session via
cdrecord -sao : please contact us.)
The development version of cdrskin is able to burn a single track to DVD+RW
or DVD-RW media.
For other DVD types and for appending sessions to ISO filesystems see the
advise to use dvd+rw-tools at the end of this text.
For DVD types other than DVD-RAM, DVD+RW, DVD-RW and for appending sessions
to ISO filesystems on DVD see the advise to use dvd+rw-tools at the end of
this text.
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@ -90,7 +90,7 @@ disc from its initial profile "Sequential Recording" into profile state
cdrskin dev=/dev/sr0 -v blank=format_overwrite
}}}
DVD-RW "Restricted Overwrite" and DVD+RW appear to cdrskin as blank media
DVD-RAM, DVD+RW and overwriteable DVD-RW appear to cdrskin as blank media
which are capable of taking only a single track. This track may be positioned
on a 32KiB aligned address, though.
{{{
@ -200,9 +200,10 @@ for an illustrated example with K3b 0.10 .
DVD advise:
For burning of DVD media the cdrskin project currently advises to use
Andy Polyakov's dvd+rw-tools which despite their historic name burn
for me on above burner: DVD+RW, DVD+R, DVD-RW, DVD-R .
For burning of DVD media other than DVD-RAM, DVD+RW, DVD-RW, the cdrskin
project currently advises to use Andy Polyakov's dvd+rw-tools which despite
their historic name burn for me on above burner: DVD-RAM, DVD+RW, DVD+R,
DVD-RW, DVD-R and are also capable of dual layer and even BD discs.
http://fy.chalmers.se/~appro/linux/DVD+RW/tools
@ -210,21 +211,12 @@ They are not compatible or related to cdrecord resp. cdrecord-ProDVD
(now obsoleted by original source cdrtools cdrecord with identical
capabilities besides the license key).
libburn and thus the cdrskin project are currently aquiring own capabilities
to burn to DVD media. For now restricted to DVD+RW and DVD-RW and to single
tracks.
To my knowledge, Linux kernels 2.6 do write to DVD+RW via block devices as
they would write to a traditional tape device. Try old tape archiver
commands with addresses like /dev/sr0 or /dev/hdc rather than /dev/mt0 .
I have heard rumors that DVD-RW in mode "restricted overwrite" would be
block device ready, too. My burner is not a real friend of DVD-RW and
in an experiment the burn worked fine - but the result was not identical
to the stream sent to the device. I had similar failure with DVD-RAM, too.
Beware of the impact of a slow block device on overall system i/o buffering.
It is wise to curb its input to a speed which it is able to deliver to media.
Else your i/o dedicated RAM might buffer a big amount of stream data.
A special feature of dvd+rw-tools is growing of ISO-9660 filesystems on
overwriteable media. This is not the same as multi-session writing of cdrskin
with CD media, but retrieves additional information from the existing ISO
image and finally manipulates the start sectors of this existing image.
So for growable ISO filesystems on DVD-RAM or DVD+RW growisofs is the only
choice, currently.
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