Hi, Ethan Andrews wrote: > wondering if I can > boot a Debian 9.1 AMD64 DVD iso directly from an installed GRUB on > another Debian partition.
Probably you look for what is called "chainloading". Google finds me among others https://wiki.gentoo.org/wiki/GRUB2/Chainloading https://superuser.com/questions/154133/grub-boot-from-iso This depends on the ISO containing own system software like kernel and initrd and the knowledge how these files are named in the ISO. So you will have to inspect the boot loader configuration files in the ISO to find the file names and other necessary options. In the bootable ISOs of Debian 9.1 amd64 this is for BIOS: /isolinux/isolinux.cfg which includes other /isolinux/*.cfg files. Use fgrep kernel /mnt/iso/isolinux/*.cfg to find those which actually define a boot item. For EFI there is in the 9.1 ISO /boot/grub/x86_64-efi/grub.cfg which includes /boot/grub/grub.cfg But you may simply put the ISO on a USB stick of sufficient size. https://www.debian.org/CD/faq/#write-usb > Preferably, is there a way of booting from the DVD boot sector in the > iso so I can boot any operating system iso as well? That would mix the roles of firmware and boot loader. (U-boot does this in some way. But i doubt it is applicable here.) Normally the firmware finds the ISO on a DVD and starts the boot loader binary which then loads its configuration file to learn how the kernels and initial disk images are to be started. > I have recently had issues with burning DVDs What issues did you encounter with which burn program ? Have a nice day :) Thomas
