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   comp.sys.tandy      Life is dandy cuz you're gettin a Tandy!      5,684 messages   

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   Message 4,898 of 5,684   
   JT SoCal to Tom Lake   
   Re: Model 4 double sided disk drives   
   08 Jul 08 23:38:36   
   
   From: JT@9b01.com   
      
   Tom Lake wrote:   
   >> It was the cable - I wonder what purpose the verify command serves in   
   >> cp/m.   
   >   
   > Just what it implies:  It does a read after write to make sure the data   
   > is correctly written to disk.  At least some versions of CP/M didn't do   
   > that   
   > automatically so they wrote very fast but errors could creep in.   
   >   
   > Tom Lake   
   It seems one of the ones that did not have it right was a version not   
   used as the source code for the DOS that was not copied from anyone else   
   by a company that just deplores copyright infringement.  I discovered   
   this in one of the non-copied versions when the wright gate control on a   
   floppy drive failed.  The system reported the wrights to be verified but   
   when the disk was removed & tried in a different drive nothing had   
   changed.  That failure has only been around for a few decades but as   
   long as the hardware is so reliable why waste time fixing something   
   rarely complained about.  Most techs today just change out hardware or   
   re-install the software anyway.  Very few could diagnose the failure of   
   a single 50 cent chip as the cause of a system failure.   
      
   JamesSoCal   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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