On Saturday 06 April 2002 09:00 am, you wrote: > Seedkum Aladeem wrote: > > A- Make the install utility do the md5sum tests automatically before the > > install is done. > > B- Make the installer utility do the memory test (and any other inportant > > test that may be neseccary) before the install is done. Heck do them also > > after the install is complete too. > > I like the idea of including these on the install, but making them > optional. > > Point A raises a point -- AFAICT, the md5sum on a burned CDROM is > different than the md5sum of the downloaded ISO (I've pretty well > convinced myself of this). Even worse, the md5sum *may* differ > depending on which software you use to burn it, and which options you > choose. > > I have a page on WikiLearn dedicated to learning more about these > points: > > http://twiki.org/cgi-bin/view/Wikilearn/Md5sumsAfterBurning > > Look it over, and if you can contribute any data points or > understanding, please feel free to do it yourself as it is a wiki, or > write to the list or me and I will edit the page. > > Randy Kramer
I am not familiar with the ISO format, but if the ordering of the information inside the ISO is not standardized, then even without any padding bytes mentioned in the WEB page you refer to, the check sum would not be reproducible. As I said, I am not familiar with the ISO format but I am making this inference using my early background in encryption, data compression and error correction. The md5sum would be much more useful if the information ordering inside the ISO is standardized (e.g. alphabetical ordering of files and directories etc.). By the way, I am not familiar with the md5sum either. I never looked inside it I just used it. Seedkum
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