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Old 02-15-2017, 04:45 PM   #1
grumpyskeptic
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Disk burners that can verify that the copy is exact after burning to disk


When I burnt data (or anything else) to a DVD or CD in windows, the burning program offered the option of verifying that the copy was exact after the burning was done. I presume that it compared the MD5s (etc) of the copy and the original to check that they were the same.

What Linux disk burning program can do this please? I have not been able to find one.

It is dissatisfying to burn something to disk, and then not be sure if it is an exact copy or not. I have in the past had instances where the copy was not exact, particularly when not copied at a slow speed.

Thanks.
 
Old 02-15-2017, 07:58 PM   #2
Doug G
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k3b for one
 
Old 02-15-2017, 08:02 PM   #3
frankbell
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K3B has a setting to verify the disk write. It's under one of the tabs--I forget which one--that opens when you click to "Burn Disk," K3B in in your repos.

Brasero to have a similar setting (they it "Check Disk Integrity").
 
Old 02-16-2017, 04:51 AM   #4
jsbjsb001
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Quote:
Originally Posted by frankbell View Post
K3B has a setting to verify the disk write. It's under one of the tabs--I forget which one--that opens when you click to "Burn Disk," K3B in in your repos.

Brasero to have a similar setting (they it "Check Disk Integrity").
When you tell K3b to burn files or disc images to DVD, etc you will see a dialog box like the one below. And you can select the option to verify the files/disc image there.
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Old 02-17-2017, 11:13 AM   #5
teckk
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man md5sum
man shasum

From a data CD I had laying around.

Check optical disk checksum:
Code:
dd if=/dev/sr0 bs=2048 | md5sum
06d4e6362d806b0491e685b285d9d181
.iso checksum:
Code:
dd if=/dev/sr0 of=image.iso bs=2048
Code:
md5sum image.iso
06d4e6362d806b0491e685b285d9d181
 
Old 02-20-2017, 10:02 AM   #6
Shadow_7
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You could probably use cmp too.

# cmp image.iso /dev/sr0

But I've never done it that way. At the end of the day you don't really care what the md5sum is, you only care that the data matches. Although cmp might be the slower / slowest option since it does a byte by byte comparison.
 
Old 02-20-2017, 10:39 AM   #7
cynwulf
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@teckk: That method will probably fail without specifying a count for dd. (The md5sum of the whole of the optical medium will usually never match the original iso.)
 
Old 03-04-2017, 05:39 PM   #8
grumpyskeptic
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K3B it is then, although it's not as easy to use as some other burners.
 
  


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