2 Dreamcasts, 1 reads all my backups, 1 reads some...why?

[OldSchoolGamer]

1 Dreamcast reads all of my CDR's (! have tested 0ver 200) the other reads some, but it's hit or miss. So since it reads some I know it's not one of those incompatible models and I have tried to adjust the pot, laser calibration etc, results varied from only reading originals to only reading backups to reading nothing at all but seems the best I can get is reading all originals but only some CDr's yet my other system reads everything (which rules out the quality of the CDR's I would think?). Anyway, my solution is to use the flaky unit as much as possible until I find a CDR that it can't read then I use the model that boots everything as I would rather preserve the "Read all" unit.

THANKS in advance......

Any thoughts/opinion/suggestions?

[Gapporin]

I know that some of the later DC's had some sort of piracy protection on them. Flip them both around and see what the manufacturer's date on them is.

[soniko_karuto]

i though that those of june/july of 2000 could not, but mine does, and is june of 2000.

[jonjandran]

It's been proven that ALL Dreamcast will boot backups.

Some just have weaker lasers than others so they have a harder time reading CD-R's.

But you can adjust the laser pot if you want to tweak it a bit so it will read them better.

[Gapporin]

It's been proven that ALL Dreamcast will boot backups.

Ah, my bad. That's good to know.