From 67598916f5e02dc5ead05db1fb3204fd4351afe4 Mon Sep 17 00:00:00 2001 From: Thomas Schmitt Date: Mon, 15 Jan 2007 12:58:49 +0000 Subject: [PATCH] Updated about overwriteable DVD and pointer to dvd+rw-tools --- libburn/trunk/cdrskin/wiki_plain.txt | 42 +++++++++++----------------- 1 file changed, 17 insertions(+), 25 deletions(-) diff --git a/libburn/trunk/cdrskin/wiki_plain.txt b/libburn/trunk/cdrskin/wiki_plain.txt index 3a4b7284..a4ae87c1 100644 --- a/libburn/trunk/cdrskin/wiki_plain.txt +++ b/libburn/trunk/cdrskin/wiki_plain.txt @@ -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. -------------------------------------------------------------------------- @@ -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. --------------------------------------------------------------------------