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On Tue, Nov 17, 2009 at 11:15:08AM -0500, Marcus Wanner wrote: |
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> On 11/17/2009 10:40 AM, Grant Edwards wrote: |
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> > On 2009-11-17, Jos? Romildo Malaquias <j.romildo@×××××.com> wrote: |
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> > |
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> > |
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> >> Once I have written a dvd ISO image to a dvd-r disk and then I have |
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> >> deleted the image from the hard disk. Now I need the image again, but |
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> >> reading the image from disk does not give me an identical image to the |
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> >> original one. |
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> >> |
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> >> I have used the commands |
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> >> |
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> >> $ readcd -vvv dev=/dev/dvd f=image.iso |
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> >> |
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> >> and |
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> >> |
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> >> $ dd if=/dev/dvd of=image.iso |
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> >> |
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> >> With both commands, the resulting image is 99.9% identical to the |
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> >> original one. |
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> >> |
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> > |
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> > If you deleted the original, how do you know? the one you're |
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> > creating from the DVD isn't identical? |
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> > |
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> > |
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> >> Is there anything I can do to get an image identical to the |
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> >> original one? |
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> >> |
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> > |
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> > Since you still seem to have a copy of the original ISO, just |
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> > use it. |
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> > |
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> My guess is that he has a slow internet connection, he downloaded a |
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> large iso, burned it, deleted it, and now wants to get the iso back |
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> without downloading it again, but he has access to the checksum/filesize |
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> of the original iso from the place he downloaded it, and when he makes |
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> an iso, the checksum/filesize does not match. |
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|
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You guessed almost right. Except by the fact that the original iso was |
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created by me and transfered to another machine, and now it is lost from |
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both machines. |
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|
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Romildo |
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