Hello, I've got an NEC ND1300 DVD burner, and the DVD+RW patch from http://fy.chalmers.se/~appro/linux/DVD+RW doesn't work on it: evidently this a firmware bug. Also this patch conflicts with the CDRW packet writing patch and stops it from working. I've made a fix for this, which can be downloaded from http://www.pond-weed.com/dvd.html With the fix, the CDRW patch works, and the same CDRW-style packet writing can be used to write to a DVD+RW too. If your DVD writer doesn't have buggy firmware, my patch will still allow you to use both CDRW packet writing and the DVD+RW patch at the same time. John
Hi- I put another patch at http://dyson.kristenscatbeds.com that is written for Linux-2.4.22. It joins the three patches together. This includes John Williams' patch, the packet-2.4.22 patch by Jens Axboe and the DVD+RW patch by Andy Polyakov. I used a Philips DVDRW228 and it worked fine as long as I used cdrwtool with /dev/pktcdvd0 instead of /dev/scd0. I used the udf format instructions from Andy Polyakov's DVD+RW for Linux site. I also have a USB/Firewire HP DVD 300e I will try it on later. The computer does stop responding if I use cp -R (some huge directory with many small files) /cdrom/ -but this was true before as well. Thanks, Dyson John Williams wrote:
Hello,
I've got an NEC ND1300 DVD burner, and the DVD+RW patch from
http://fy.chalmers.se/~appro/linux/DVD+RW
doesn't work on it: evidently this a firmware bug. Also this patch conflicts with the CDRW packet writing patch and stops it from working.
I've made a fix for this, which can be downloaded from
http://www.pond-weed.com/dvd.html
With the fix, the CDRW patch works, and the same CDRW-style packet writing can be used to write to a DVD+RW too.
If your DVD writer doesn't have buggy firmware, my patch will still allow you to use both CDRW packet writing and the DVD+RW patch at the same time.
John
This includes John Williams' patch, the packet-2.4.22 patch by Jens Axboe and the DVD+RW patch by Andy Polyakov.
I used a Philips DVDRW228 and it worked fine
Would you be able to give some rough idea of speed? Like number of files, their combined size, and how long it took, at what writing speed and which media. Please also use md5sum and verify that each of the files have in fact been burnt correctly. It seems reasonably common that some files are corrupted, although things look fine at first sight. Thanks, Volker -- Volker Kuhlmann is possibly list0570 with the domain in header http://volker.dnsalias.net/ Please do not CC list postings to me.
Hi- I tried to copy the built Linux source tree to the UDF DVD+RW formated with mkudffs --spartable=2 --media-type=cdrw /dev/pktcdvd0 and mounted with mount -t udf -o noatime,rw /dev/pktcdvd0 /cdrom/ The computer churned away for about on hour or more with the computer not responding. It must have quit after a while because when I did diff -rq /cdrom/linux-2.4.22 /usr/src/linux-2.4.22 it said that most of the directories were missing. However the files it did copy were the same. The drive would seem to write a file then read a file over and over again. So it was taking forever to burn a bunch of little files in a row. I would say at .01x speed. My next test was to copy a 500MB directory using tar. tar -cf /cdrom/data5.tar /data5 This worked very well. It took the same time to burn as with growisofs (2.4x) would because it was a single file. I than did: mkdir temp cd temp tar -xf /cdrom/data5.tar -C . diff -rq /data5 data5 All of the files were the same! When I used to use just the DVD+RW patch this would not be true because of fragmented writes. I wrote the same tar file with different names to make sure the DVD would write beyond 700MB. tar -cf /cdrom/data5_2.tar /data5 tar -cf /cdrom/data5_3.tar /data5 I checked these with diff also and they were also OK. At this point I wrote 1.5GB to the DVD in three big files without any problems. I am happy this works because now I can use a backup program that will write big files to the DVD+RW formated with /dev/pktcdvd0 instead of /dev/scd0 without having to use /dev/raw devices with aligned_io.so with pipes. Thanks, Dyson Volker Kuhlmann wrote:
This includes John Williams' patch, the packet-2.4.22 patch by Jens Axboe and the DVD+RW patch by Andy Polyakov.
I used a Philips DVDRW228 and it worked fine
Would you be able to give some rough idea of speed? Like number of files, their combined size, and how long it took, at what writing speed and which media.
Please also use md5sum and verify that each of the files have in fact been burnt correctly. It seems reasonably common that some files are corrupted, although things look fine at first sight.
Thanks,
Volker
I tried the http://dyson.kristenscatbeds.com/pktcdvdrw_plusdvdrw_2.4.22.patch.bz2 patch against Linux-2.4.23-pre4 with an HP DVD 300e hooked up with firewire and it did not work so well. I then tried it with USB 2.0 and pktsetup worked like a charm! I was able to format with mkudffs --spartable=2 --media-type=cdrw /dev/pktcdvd0 and mount and write to it. I did not try to write a bunch of small files in series. I was able to write a 1.2GB file in around 13 minutes. I did a diff on the 1.2GB file after an eject and remount and they were the same. The reading speed of the HP DVD 300e is better than the Philips DVDRW228 by about 10% while the write speeds are about the same. I'm not sure why it did not work with firewire but I'll look into that later. -Dyson
participants (3)
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Dyson -
John Williams -
Volker Kuhlmann