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checksum for burned DVD not correct?

asked 2014-06-15 05:30:29 -0600

updated 2014-06-15 10:57:00 -0600

mether gravatar image

f2eeed5102b8890e9e6f4b9053717fe73031e699c4b76dc7028749ab66e7f917 *Fedora-20-x86_64-DVD.iso

the checksum of ISO is correct but when I burn this to DVD many times, they are the same different from this checksum and if i use ImgBurn, it shows:

Image File Implementation Identifier: ISO MD5SUM = b39b2f6770ca015f300af01cb54db75c;SKIPSECTORS = 15;RHLISOSTATUS=0;FRAGMENT SUMS = 8c2957378e902aeae59e24f61cf6434a5a721a211554de06ce6caf95812d;FRAGMENT COUNT = 20;THIS IS NOT THE SAME AS RUNNING MD5SUM ON THIS ISO!!

i unzip the iso with 7z, compare this two, the burned DVD doesn't have this file "[BOOT]/Bootable_NoEmulation.img"

what is happening?

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answered 2014-06-15 07:43:43 -0600

hedayat gravatar image

Notice that Fedora iso checksums are NOT md5 checksums but sha256 checksums. You can verify the checksum of both .iso and burned DVD usign sha256sum command (I assume that you have a GNU/Linux OS).

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I know it. I meant ISO is the same sha256sum as website, but burned DVD isn't the same sha256sum.

a5671462 gravatar imagea5671462 ( 2014-06-15 09:00:31 -0600 )edit

Aha, I thought that you are comparing md5sum of the burned DVD because you included it in your question. How do you calculate sha256sum of the DVD? Also, I don't see any Bootable_NoEmulation.img file in Fedora 20 x86_64 DVD iso.

hedayat gravatar imagehedayat ( 2014-06-15 11:24:02 -0600 )edit

i used Hash Codes to calculate it, if you have burn this dvd, maybe your sha256sum is the same as mine. Because I burned it with many DVD drives, and discs, they are always 'F70B02F646FA46ED51442467A9E98478087974E007D8D52312915EF5C249A605 '.

a5671462 gravatar imagea5671462 ( 2014-06-16 10:51:03 -0600 )edit

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Asked: 2014-06-15 05:30:29 -0600

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Last updated: Jun 15 '14