FC5-i386-disc1&2.iso File Size

[Tod Merley]

On 3/23/06, Nader Mirzaee <nmirzaee at yahoo.com> wrote:
>
> hi all
> i have downloaded disc1 & disc2 iso images by bittorent from bordeaux site
> ,but when i compare it to redhat fedora files there is a difference in the
> file size
> what i have :  disc1  671M                redhat fedora file size: 655 M
>                     disc2
> 684M                                                 668 M
>
> can someone explain it?
>
>
>
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Hi Nader!

I am not sure exactly what you are talking about here.  I did notice that
the file size of the ISO (the disk file image) was slightly larger than the
resultant CD as indicated by the burning program.  I am glad that my burning
program checks the MD5 sums (a file integrity check) before it burns the
image.  It is always good to do so (see link):

http://www.linuxiso.org/viewdoc.php/verifyiso.html

You should find a list of the file MD5 sums on the same site you downloaded
the ISOs.

I am suspicious that the differences in ISO image file size and resultant CD
size is caused by the boot and metadata portions not being counted as "data"
(see link):

http://en.wikipedia.org/wiki/ISO_image

However, there is probably some overhead just in the ISO9660 file system
(see link):

http://groups.google.com/group/sol.lists.freebsd.questions/browse_thread/thread/886bb211f1446ed0/a31057f220bd62dd?lnk=st&q=ISO+file+size+vs.+CD&rnum=9&hl=en#a31057f220bd62dd

And the truth is I really do not yet know for sure (and need to go to sleep
now).

Regards!

Tod
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