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On 15 March 2006 00:00, Joseph wrote: |
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> Is there any limitation in using "dd" to generate backup of DVD (dvd is |
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> 4.7, unencrypted)? |
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There is not. |
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> |
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> If I use: |
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> dd if=/dev/dvd of=backup.iso |
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First of all, I would add the "bs" option to increase the buffer and therefore |
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speed. Something like: |
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dd bs=100000 if=/dev/dvd of=backup.iso |
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> I only get about 2Gb file and it stops or freezes, the disk is bout |
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> 4.3Gb |
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That would indicate read errors. Is the dvd scratched or dirty? Wash it with |
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lukewarm water and dishwasher liquid and try again. |
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Also: You have a iso like my.iso that you have burnt to a dvd. Now you read it |
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back to back.iso and compare checksums to make sure the dvd has been burnt |
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correctly, you will almost always get an error. Reason is that dd reads a |
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couple of bytes of trailing garbadge back. :-( |
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Uwe |
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-- |
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Why do consumers keep buying products they will live to curse? |
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-- |
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