On 10/7/26 9:32 AM, CGS wrote:
I don't have a thorough understanding of all the underlying details, but it does seem to me the iso gets written at the beginning, leaving lots of trailing free space. The catch seems to be the partition table does not seem to expect that additional space to be used for additional purposes. As I noted in an earlier post today, I did get it working on one of my usb drives, but it seems sort of a hacky configuration.On 2026-10-07, nwe<[email protected]> wrote:One of my 32GB USB sticks here I dd copied an ISO-9660 to it then formatted the remaining space as an additional partition with FAT32. It is not very user friendly, most file browsers do not even list that second partition for me until I mount it manually at the terminal.</p>What's confusing to me is when you write the ISO to the thumb drive it uses the entire space, though the drive might have a larger capacity than the ISO itself. So where is the latter written: At the beginning, the end, in the middle, or all over the place? Could you have a partition at the "end" of the drive and use some tool to write the ISO at the "beginning" so that the end partition is preserved? I've never heard of that being done; it's always the inverse case, like your own. ISO first, then data partition (I think the term they used to use was "persistence").
I'll have to study it a bit to recall how I did it, I can do that if you're wanting to know how I got it working. :)
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