Scan causes reset

I have 2 drives (different brands) connected (via USB hub) to my Airport Extreme router. Every time I attempt a media scan, the Apple TV does a reset. I tried the 2 drives separately, and the scan seems to work fine with the G-Drive. But as soon as I add the Seagate Expansion drive, the reset problem comes right back. Is it possible that some drives are more compatible than others? Thanks.

It might be the drives content that is the problem. I have had cases where the presence of a particular (I assume corrupt) file would cause resets as soon as that file was reached.