From: r.bazzano@ulm.nospam.it   
      
   > My experience (admittedly on a small sample of machines) is that PC FDCs   
   > can't read sectors with FA DAMs at all -- they are not recognized as   
   > valid sectors.  It's certainly possible that some PC FDC's can read   
   > them, but it seems unlikely.   
      
   Exactly.   
   And I'm absolutely sure that my disks have FA as directory address mark, and   
   F8 as data address mark, because in the past I wrote an assembler routine   
   that directly access the FD controller to read tracks and dump them to see   
   what data there is on disks, so I looked at them.   
      
   Roberto   
      
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