Hi, Andy Polyakov wrote: > USB1 full-speed is 12Mbps or 1.5MBps, right? 0.2x4390KBps is around half > the speed...
Yes. But 0.2x was the average. At the end the run was around 0.35x. Given a certain overhead in the USB bit stream this is slightly too much. But i just read from Rob, 5 Oct 2009: > Note that my blu-ray drive is connected to my system via USB 2.0 and Rob freshly: > Burning DVDs on the Plextor PX-716UF drive using cdrecord > from my Solaris10 (sparc) machine is pretty fast. For USB 2 this would be truly awful performance. > > Does it mount? > Yes, I can see all of my files on the Windows machine too. This means the first few MB of the image are readable. The bulk of file content is not tested by showing a sound directory tree. Readable file content should be unaltered. If you find content deviations without seeing i/o errors then the data was altered after leaving the realm of the burn program and before being burned to media. > Wow, dd is really slow. I am still waiting for results. That's really a riddle. What USB SATA bridge would be that slow ? > should only take 30 minutes, with no errors. On unformatted BD-R i achieve 9 MB/s = 28 minutes for 7634768 blocks. Plus preparations and post production. Yep. 30 minutes is realistic. With growisofs that would need option -use-the-force-luke=spare:none which Andy does mention but not recommend in http://fy.chalmers.se/~appro/linux/DVD+RW/Blu-ray/ With formatted BD-R you have to live with half speed. That's still about 4 times faster than what you experience now. >>> :-[ CLOSE SESSION failed with SK=5h/INVALID FIELD IN CDB]: I/O error > It's harmless bug. It was discussed earlier. A. Sorry for not paying attention. We are getting quite multithreaded from time to time. :)) Well, i am curious whether the media delivers all recorded blocks. A CentOS experiment with growisofs-7.1 would be interesting too. Have a nice day :) Thomas -- To UNSUBSCRIBE, email to cdwrite-requ...@other.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@other.debian.org
