On 2012-07-31 6:27 AM, TOM WALKER -> ED VANCE wrote:   
      
      
    TW> Teh First edition of DOS 3 only recognized 20 Meg Hard Drives. In those   
    TW> days the 40 Meg Segate was popular and was divided into two 20 Meg   
    TW> drives. Compaq with theri DOS 3.1 was factory modifies to recognice thye   
    TW> 40 as one drive. I liked that as my First DOS computer, a Home Built XT   
    TW> clone used a 30 Meg drive.   
      
      
   Not entirely accurate - early versions of DOS (PC DOS, MS DOS, etc) through   
   3.2 allowed drive partitions up 32 MB... so that 40 MB Seagate could have been   
   partitioned into a 32 MB partition and an 8 MB one.   
      
   It would be interesting to get a list of all the limitations of RAM, hard   
   drive, file size (etc) built into various versions of DOS, Windows, Mac OS,   
   etc. (Yes, even the Mac - while it never had things like the 640 kb DOS memory   
   limitation - has had limitations).   
      
   Even now, folks sometimes bump up against 2 GB file size limitations,   
   particularly with 32-bit operating system versions.   
      
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