I've been trying several times to burn an ISO file to my USB, even with Unetbootin, on Ubuntu it doesn't seem to work at all, how come when I download the software that it suggests me to use, and it doesn't works how to fix that issue?

Even if I try to reboot my pc it gives errors that it doesn't reads the USB?

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    – Tim
    Jun 8, 2015 at 20:01
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    @rene I did find kicking an old computer of mine got it to sop making bad noises but that's separate :)
    – Tim
    Jun 8, 2015 at 20:03
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    @Tim Kicking also fixes such oddities as Failure to Boot, Controller Errors, Fan Failure, Keyboard Stuck, and a host of others ;) Jun 8, 2015 at 20:04
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    What is the size of .iso image? what is the partition table of usb stick it formated fat32, ntfs etc? and what is the capacity of that usb stick? provide more information
    – JoKeR
    Jun 8, 2015 at 20:06
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    In any case, dd if=image.iso of=/dev/sdX should do the trick.
    – kos
    Jun 8, 2015 at 20:09

1 Answer 1


By default this is how it's made and look like:

FAT = Maximum file size is 2 GB.

FAT32 = Maximum file size is 4 GB.

NTFS = File size limited only by size of volume.

As you can see this is the support of the file/image size that supported by each system/partition table.

So, if you're planning on using files larger than 4GB it is recommended to use NTFS nowadays. How to format a USB or external drive?

  • Much obliged will format it as ntfs like a cd or dvd is, thanks
    – Des Coene
    Jun 8, 2015 at 20:42
  • I'm not sure a installation USB should be NTFS... I was told to do it FAT 32.
    – Tim
    Jun 8, 2015 at 20:45
  • well @Tim actually try to burn Win7 .iso Ultimate which is about 7.5-8.xGB in size? Some time ago my friend asked me to install Win7 on his pc so when I tried to burn it with Fat32 I spent lot of time trying to till then when I decided to go back to the website I downloaded it from and in noticements I saw a tutorial how to burn it which suggested to format usb to ntfs ;)
    – JoKeR
    Jun 8, 2015 at 20:52
  • That is why they recommend a 16GB USB drive for 7.5-8.xGB ISO files. The limitation is a single continuous file, not the size of the partition. FAT32 supports up to 16TB partition. As long as no file in the ISO file is over 4GB, leaving it at FAT32 does not hurt at all. en.wikipedia.org/wiki/Comparison_of_file_systems#Limits
    – Terrance
    Jun 8, 2015 at 20:55
  • Yes @Terrance that's what I stated in my answer if the file is over 4GB that's what happened in my case. It was a mod of Win7 which contained such a huge file it was just compressed this way into one big .exe and some additional stuff/utilities. ;)
    – JoKeR
    Jun 8, 2015 at 21:03

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