Hi, > It also seems to have some kind of GPT table, [...] > What tools did you use to get from the file structure on disk to > the hybrid image? Did you use "isohybrid --uefi" from the syslinux > package, or something else?
The hybrid aspects are generated by xorriso along with the ISO image. No post-processing is needed. I am the author of xorriso, but cannot tell the exact xorriso arguments that were used. Afaik, Debian uses xorrisofs options which produce similar results as "isohybrid --uefi". Those options were inspired by http://mjg59.dreamwidth.org/11285.html Technical details have been collected in http://bazaar.launchpad.net/~libburnia-team/libisofs/scdbackup/view/head:/doc/boot_sectors.txt Options of xorriso's mkisofs emulation xorrisofs are documented in http://www.gnu.org/software/xorriso/man_1_xorrisofs.html > parted and gdisk choke on it and tell me it's not valid. There is a bug in the GPT production of xorriso-1.2.6 and 1.2.8. The checksum of the GPT header was computed from all 512 bytes of the block rather than from the first 92 bytes. This is fixed meanwhile in the current development snapshot http://www.gnu.org/software/xorriso/xorriso-1.2.9.tar.gz I plan to release 1.3.0 next week. It would be great if we could find out whether the complaints vanish if the image is generated by the current snapshot. I will now begin to make experiments with repacking debian-7.0.0-amd64-netinst.iso. But not knowing the exact arguments, i might miss the point. ------------------------------------------------------------------- Here is what i used as test for replaying the stunts of http://mjg59.dreamwidth.org/11285.html I understand that mjg created his image by isohybrid --uefi --mac. I fetched Fedora-LiveCD.iso, extracted the isohybrid MBR (which would normally come from local SYSLINUX installation), mounted the image, and repacked it to a new ISO image: dd if=/dvdbuffer/Fedora-LiveCD.iso bs=512 count=1 \ of=/dvdbuffer/Fedora-LiveCD.mbr mount -o loop /dvdbuffer/Fedora-LiveCD.iso /mnt xorriso -as mkisofs \ -o /dvdbuffer/FedoraRepack.iso -no-pad \ -isohybrid-mbr /dvdbuffer/Fedora-LiveCD.mbr \ -c /isolinux/boot.cat \ -b /isolinux/isolinux.bin -no-emul-boot -boot-load-size 4 \ -boot-info-table \ -eltorito-alt-boot \ -e /isolinux/efiboot.img -no-emul-boot \ -isohybrid-gpt-basdat -isohybrid-apm-hfsplus \ -eltorito-alt-boot \ -e /isolinux/macboot.img -no-emul-boot \ -isohybrid-gpt-hfsplus -isohybrid-apm-hfsplus \ -V Fedora-LiveCD \ /mnt Tested by me only with amd64 BIOS. (It does not boot if not named "Fedora-LiveCD".) ------------------------------------------------------------------- Have a nice day :) Thomas -- To UNSUBSCRIBE, email to debian-cd-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/10515623477929998...@scdbackup.webframe.org
