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I have an old computer that can't handle a boot stick install, so i have to create an actual, old fashioned boot CD.

However, the image size for Ubuntu 12.04 is 732MB, which is too large for a CD, which can hold only 700MB.

The maintainers of Ubuntu 12.04 say the image size will never go over 700MB, and indeed, the download size seemed to be 689MB.

Brasero says it won't burn the CD because the file is too big, what's going on?

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command line command dd can be used to burn an ISO (sudo dd if=/dev/cdrom of=/dir/to/file.iso) – Rinzwind Aug 14 '12 at 19:17
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The issue could possibly be because of the differing definitions of MB. Even if it's not, you should be aware of it to save you headaches later on. – Flimm Nov 30 '12 at 13:07

7 Answers

up vote 7 down vote

Are you using a 74 minute CD-R? You need to use an 80 minute one.

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up vote 5 down vote

I use K3B to burn ISO images. For me, is better then brasero.

Try to burn with another CD brand (Preferably do not use CD-RW )

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I've had the same issue and with another CD brand solved my issue! (verbatim worked) – Zuul May 16 '12 at 2:49
i used k3b, and it worked. (brasero was unable to use any of my three different brands of cd-r.) hm - how do i mark this thread as solved? – memius May 16 '12 at 11:22
Find closed to my answer a tick, that must be pressed. – Subv3rsion May 16 '12 at 11:29
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@memius, If this answer solve the issue, mark it as the accepted answer by clicking on the check box outline to the left of the answer. see here how – Zuul May 16 '12 at 13:33
TDK works for me. – ObsessiveSSOℲ Aug 3 '12 at 20:18
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up vote 4 down vote

Try downloading it from the alternative link at the Ubuntu website (the torrent one). It's about 695MB (AMD64), and the Intel one is 687MB.

http://www.ubuntu.com/download/desktop/alternative-downloads

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up vote 3 down vote

If you dig deeper, you'll stumble upon this particular URL which has the "CD" images. http://releases.ubuntu.com/precise/

All images are <= 700MB and created specifically for "CD"s unlike the official download link which is actually meant to be burned on a DVD. Hope this helps if anyone is still looking for answers to this question.

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up vote 2 down vote

you have to follow the instructions for create a image of ubuntu from any version of ubuntu. This way is not a traditional burning cd's. You know, is different because Ubuntu 12.04 size more than 700 mg, so you must follow the instructions which are in this page: http://www.ubuntu.com/download/help/burn-a-cd-on-ubuntu

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up vote 2 down vote

If you're trying to install Ubuntu 12.10 (Quantal Quetzal), it is too big for CD now, so you need to use USB or DVD install options.

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up vote 1 down vote

702mb and 732mb is still to big for a cd right, and i'm not sure about the installation to be compatible with dvd r, the simple choices are to install it on a flash drive/USB or buy a cd brand with more than 700mb such as verbatim

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A standard CD has 703 MB. They are marketed as 700 MB for marketing reasons. Having a round number is better, but they can fit around 703 MB, as I said. However, it is not advised to fill a CD completely as the last sectors might not be in a particularly good condition. – Martin Oscar Caballero Dec 1 '12 at 2:53

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