From: nowhere@nevernet.at   
      
   On 30/10/2021 14:46, muta...@gmail.com wrote:   
      
   >>> that the first 512 bytes of the hard disk doesn't store the sector   
   >>> size.   
      
   sector size is found in the ATA/ATAPI IDENTIFY-(packet)-DEVICE  HD (CD).   
      
   >> I thought sector size was a hard drive physical property and not   
   >> something that could easily be adjusted. Thus there is effectively no   
   >> need to look it up.   
      
   > When the hard disk data is extracted into a flat file of   
   > sectors, how do I know how many bytes to skip to go   
   > to a particular LBA address?   
      
   LBA28 and LBA48 in PIO mode always access only 512 bytes,   
   it needs other commands to rd/wr 4k blocks.   
      
   > I have an expectation that data can be copied to and   
   > from devices and still be accessible.   
      
   > I need to either distinguish devices based on sector size   
   > or I need to introduce a dummy sector. If I have a dummy   
   > sector I would have an expectation that the firmware   
   > would maintain that sector as if it was real.   
      
   how to add a dummy sector to an existing HD ?   
      
   > Or maybe I am looking at things incorrectly.   
      
   probably   
   __   
   wolfgang   
      
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