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When you burn say an Ubuntu disk image to USB, why is all this not automatically done; and how can it be done if the act of burning would overwrite anything you have done before?
– Superdooperhero
Commented Jun 17 at 9:02
1

@Superdooperhero been a while since I looked into this and I haven't tested this so could be wrong, but perhaps it's likely that the options that rufus offers when burning onto USB would burn something slightly different onto the USB. So it has an image to write to the USB, and that image has some structure to it, and within that structure is the image for the thing it's meant to boot into. So Rufus will generate an image which wraps the thing to boot off of(which will be the bulk of the image).
– barlop
Commented Jun 17 at 14:45
1

@Superdooperhero also on a related note, and not to say it's what's going on there but it is possible for a USB to have multiple partitions. superuser.com/questions/858811/… Not to say rufus is or isn't doing that but in theory perhaps it could. Though even with one partition it could customise its images, by wrapping the image to write.
– barlop
Commented Jun 17 at 14:48

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