I can burn new, but not read older CD's in Big Sur. Why?

[blackxacto]

With Big Sur on an 19,1 iMac, no issue burning CDs w my OWC Burner, but reading older CDs gives me a com.apple.diskmount.dis error 49153. Why?

 

[DeltaMac]

How old is the OWC burner?

Are the problem CDs burned (not commercial CDs), and were they burned on THIS OWC burner?
Do any recently burned CDs not read -- or are the non-mounting CDs only older CDs?
Have you tried any kind of cleaning on the burner (even something like a few "puffs" from a can-o-air (always handy to keep a can around for a quick "blow")

 

[blackxacto]

I can read and copy from any old CD I have burned by me or not on my OWC DVD Player, IF I am using Mojave. If I try to open older CD's which opened in Mojave, but on Big Sur. No the error occurs.

 

[Slartibart]

My machines are not on Big SUR but you can try to fix the problem by following this description(s).

 

[blackxacto]

Thank you. I will try your recommendations and report back.

 

[blackxacto]

Well, I don't understand what happened, but I (Method #1) successfully mounted two old CDs and grabbed their contents in Big Sur. However, the patching stopped working as I can't mount anything afterwards. So, will try Method #2.

 

[fisherking]

what are CDs? and why would you burn them?

 

[blackxacto]

My machines are not on Big SUR but you can try to fix the problem by following this description(s).

I tried to go by Method #2 but its beyond me. I don't understand how it worked for 2 older CDs, then stopped working.