Varible speeds of burning..?

it took thirty minutes to burn 4 percent on cd clone then thirty one to burn 70%… and thirty two to finish!!! is this a known bug or what i don’t understand. :bow:

I had a similar problem recently. I read in a DVD-ROM which was doing very well until it got yo 51%. Then it started having trouble and slowed right down. The log window showed that it was failing to read sectors (is there anything in your log window when this happens?). In the end I aborted the process since it was making very slow progress. I took the disc out of the drive, and carefully cleaned it with a soft cloth. I put it back in and it completed the dual layer DVD-ROM in 31 minutes with no error messages in the log window. So the lesson is make sure that your source disc is spotlessly clean before starting. Hope this helps.