Gecko/20110303 Thunderbird/3.1.9   
   rogrammer.misc,comp.os.os2.misc   
   UTC)   
   os2.utilities:162 comp.os.os2.programmer.misc:2077 comp.os.os2.misc:3124   
   From: Jonathan de Boyne Pollard    
      
   >> * Raw access with DosRead/DosWrite/DosSetFilePtr works just fine on    
   >> your ~4GiB FAT32 volume.   
   >>   
   > No. We know that it does not work OK.   
   >   
      
   Yes, we know that it works OK when reading and writing whole disc    
   sectors using the raw interface.  Allan has run CHKVOL all of the way    
   through quite successfully, twice even, and sent me the log of its    
   output as proof.  The fact that I know how big a volume it is is    
   testament to that.  The volume size is part of the summary that CHKVOL    
   prints out when it has finished.   
      
   > In my experience, it works OK with 512 B reads, not with 64K reads    
   > (and IIRC, not even with 4K reads).   
   >   
      
   I wouldn't be surprised by several of the 16-bit innards of OS/2 having    
   problems with I/O in chunks of 64KiB.  That's one of the reasons that    
   the FORMAT code in my FAT.DLL caps cluster sizes at 32KiB when it is in    
   IBM OS/2 compatibility mode, so that it avoids creating volumes that    
   OS/2 might then have trouble with.  (Some of the other reasons are the    
   same as Microsoft's.  See KnowledgeBase article Q184006 et al.)   
      
   --- Internet Rex 2.31   
    * Origin: virginmedia.com (1:261/20.999)