TZUTC: 1000   
   MSGID: 200.fido-classicc@3:633/410 21ef407f   
   REPLY: 2:221/360 5d88dfbc   
   TID: SBBSecho 3.03-Linux r3.65 Dec 31 2017 GCC 4.6.3   
   -=> On 09-23-19 18:07, August Abolins wrote to Tony Langdon <=-   
      
    AA> On 22/09/2019 9:08 p.m., Tony Langdon : August Abolins wrote:   
      
    >   AA> Have you tried the same DVDs on a newer machine?  An older machine   
    >   AA> could start developing problems tracking, among other things too.   
    >   
    > Yes - multiple machines, same result, whether a Blu-ray or a newish   
    > computer DVD drive.   
    AA> Did the disc ever get exposed to extreme changes in the temperature and   
    AA> moisture?  Apparently the edges of those discs expose the recorded   
    AA> layer. Humidity would be a killer.   
      
   No, they live inside, and humidity here is low much of the year.   
      
      
   ... Real Sysops read the documentation; or at least skim them   
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