K3b cache write error

I tried to burn a DVD ISO image and got the following error:

flushing the cache
write error

So I set the Manual writing buffer size to 2MB. This can be changed in the Advanced configuration settings:

Settings -> Configure K3b -> Advanced

After I selected the image to burn, and the "Burn Iso9660 Image" window appeared, I also changed the Speed to 2.x

Then I successfully burned my DVD ISOs.


Also, k9copy is a great application if the DVD ISO size is over 4.7GB and doesn't fit on a DVD. With k9copy the content of the DVD opens as tree and you can select whatever you might need and want on the DVD up to the size of the DVD and then backup only these parts or "Titles".
For example you can skip all the previews and only backup the movie for example.
On linux.com is a good documentation aobut k9copy.