Is getting an image of a disc (eg with brasero) the same thing as going into the cd, selecting everything and putting it into a .iso archive (eg with 7zip or ubuntu's archive manager)?
4 Answers
No, it is not the same. For a disk that is only holding data, it probably won't make much of a difference, but some disk have things that would be copied incorrectly, or not at all by just a select all.
For example, if you selected and copied files into a new archive, you could not replicate a bootable CD like your operating system CD.
The ISO 9660 aka CDFS has lots of meta-data, that you may need in some cases.
CDs can have hard-links for example. I have a ISO that fits on a CD ~500MB, but if you tried to a simple copy to the filesystem, it would appear to have over 1.2GB worth of data on it
In short, the answer is no. It will record additional information like where the files on the disc were, which would make things like copying a bootable disc more effective.
If you were to copy a bootable disc just by selecting everything on the disk, and then burned the resulting files, it would not work. Taking the image using a program that generates and ISO would do the job properly.
It is not the same. If the CD ISO has special parameters (ie booting your computer) then just copying the the files from a CD to an ISO would not copy those special parameters.
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I'm kind of scratching my head as to why you would upvote an answer that directly contradicts yours...– soandosDec 22, 2011 at 1:15
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Read my comment. Up vote was ironically given for his sarcasm and my sarcasm for the up vote which contradicts my answer. It's a paradox.– kobaltzDec 22, 2011 at 1:18
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Yes. It is the exact same thing. I don't know anything about "brasero" (or Ubuntu's archive manager or 7zip for that matter) , however .iso images are not compressed (a 700mb .iso fits perfectly onto a cd).
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Even for bootable discs??? I believe, (as the the other answers that arrived at basically the same time) that you are mistaken. (hence the -1)– soandosDec 22, 2011 at 1:07
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brasero
is a cd-authoring tool, it will copy a cd using something like dd to make a bit-for-bit copy. I am pretty sure he is asking if he can select files in file-manager and copy them into some kind of archive tool. This is not the same at all. Dec 22, 2011 at 1:12 -
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