so long story short i was trying to make an old x86 laptop boot into a live cd environment i could use, but i didnt have a livecd so i used debian’s install cd, but i wanted to try out guix When i copied files off the guix cd the kernel would spew errors (earlier oops). debian 12. So of course i made an iso of the cd figured it was a hardware thing but no this iso also upset the kernel to read files from, and they’d come out corrupt I tried some iso tools from the debian cd and they seemed confused too So i didnt know if my guix cd was bad, or debian was bad, or the laptop was bad. I checked the hash and signatures and the cd seemed good, which was quite slow to do in the old system without tools So of course i strace’d the tools to figure out what logical offsets the data was at and began reverse engineering iso966- by inspection to see if i could make further progress, which i did, slowly …