On Thursday, August 23, 2018 at 10:27:24 PM UTC-4, Tom Lake wrote:   
   > I'm trying to make a copy of the Tandy CP/M Plus 1.00.00 disks on my Model   
   4D.   
   > The target is formatted then when the computer tries to copy, I always get   
   an error on track 1. The drives have passed all diagnostics (Floppy Doctor)   
   and work fine with TRSDOS and LS-DOS so I'm reasonable sure they're OK. Is   
   there a trick to making    
   COPYDISK work? A patch maybe?   
      
   I bought that package originally and it would not boot on my early Model 4.    
   Radio Shack, the jerks they were, would not refund my purchase since the   
   shrink wrap had been opened.  So I let it sit on my shelf.  Many years later I   
   acquired a newer Model 4    
   that would boot them.  I didn't bother trying to copy them at that point.  The   
   BIOS and utilities were quite buggy and they never fixed them to my knowledge.   
      
   Even more years later I used a PC with Teledisk to image them.  As it happens,   
   they use an 18 x 256 byte sector format on the boot track 0, same as the other   
   TRS-80 Model III and 4 double density disks.  Tracks 1 to 39 were 8 x 512 byte   
   sectors.   
      
   Is the COPYDISK you are using one of the CP/M utilities? If not, it won't work   
   on the CP/M Plus disks due to that track format difference.   
      
   Amardeep   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)