On Wed, 13 Jul 2005, Christian Grigis wrote: > Hello, > > I am experiencing a rather strange problem when trying to write a CD > image to an external burner connected via USB: even though there are no > errors mentioned during the burning process, the burnt image is incorrect > (several bytes have been randomly changed). > > I noticed the problem some time ago, but since I have so far been using > the device mostly for reading CDs (which works fine), I didn't get the > time to investigate further until now. > > The burner: PLEXTOR PX-716A DVD+-RW burner, IDE interface > Casing: Sarotech MyBox, with both USB 2.0 and IEEE-1394 interfaces > > For the purpose of my tests so far, I have been trying to write an ISO > image to a CD-RW media (after turning several CD-Rs into coasters...). > > I have tried burning in three different conditions: on my desktop > machine via USB 2.0, on my laptop machine via USB 1.1, and on my laptop > machine via IEEE-1394. Both burns via USB turn out to be incorrect, > while the IEEE-1394 burn is perfectly fine. > > Following are some more details. I am including the commands used for > burning (I am using the 'burnfree' option so the high-speed CD-RW can be > burnt via USB 1.1), the command to perform the comparison (a small Python > script, here attached), the cdrecord log for the first burn (the other > ones are similar), and in case of an incorrect burn, the first few lines > of the comparison. > > For reference, 'mooch' is the desktop machine (ASUS A7V600-based, native > USB, info attached) and 'earl' is the laptop machine (Dell C400, native > USB, PC-Card for IEEE-1394, info attached). > > Does anyone have an idea of what is going on? > I am planning to get an external hard-drive to perform additional tests > on a non-CD device. > > Any other ideas of what I should be trying next? > > Thanks for any help!
You seem to be doing everything correctly. Just as a guess, I'd say that there might be something wrong with the USB interface in the CD writer. Alan Stern ------------------------------------------------------- SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! Get everything you need to get up to speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
