Can't 411S read dual-layer discs?

I’ve been using 411s to back up DVDs for a year. Recently it failed to read some DVDs which I believe are dual-layered. Is it a common problem? Anything I can do other than buying a new burner? Thanks.

All 411 firmwares will read DL DVD-ROM and DL DVD-Video. Do you get the problem with a original pressed or burned DL DVD ? What is the size in GB of the DVD ?

I thought so, too. It failed to read original copies of DVDs which are over 7GB in size. I also tried to watch one of them, it couldn’t get pass the midway point. That made me believe it has trouble reading DL discs.

Last night I updated with the latest firmware. Didn’t help either.

What’s going on? Thanks.