Whats up with my Shenmue 2 discs?

[Chowchilla]

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Both discs have different issues. Disk 3 has the same error as Disk 2 and Disk 4 works fine.

i have no problems with my Shenmue discs and ive tried Super Runabout and they work file.

All are original Dreamcast Discs

[strider16]

Wow, it is scary. The first error I have seen before with my disc 1 of skies of arcadia, I think I did it one day when I tried to close the case and the disc was misplaced, I pressed it a bit in a border. The exactly same thing, it is read as a game disc, the sega screen appears and then back to system menu. It was a really light mark on the disc, and not on the printed side, the specular surface was not damaged. I think, in my case, polishing the disc or adjusting the dc reader could fix it.

The second error, I never had seen this before. I think both errors could be the dc wearing, and needing to be adjusted, since the shenmue discs must be more dense than other games. Testing them in other console should help to isolate the problem.