Package: grub2 Version: 1.98~20100101-1 Severity: normal Hi,
grub2 is currently unable to chainload a disk or cd-rom (.ico) image. I want to be able to boot the Balder boot disk FreeDOS distribution [1]. I place the image file balder10.img into my /boot ddirectory and try to boot it from grub using the following commands (and several variations of it): loopback (fd0) /boot/balder10.img chainloader (fd0) +1 I always get the "invalid signature" error message. If I leave out the "+1" from the chainloader command I get the "no file specified" error. I know it is possible to mount cdrom images (e.g. linux distribution live cds) and directly specify the kernel and initrd files relative to the loopbacked device. But that's not what I want (and it certainly only works for complete linux distributions and no other OSs). I want to be able to boot the image *as if the disc was inserted in the drive*. For the Balder FreeDOS boot disk I currently help myself by loading syslinux-common's memdisk image via the linux16 command and the balder10.img image via the initrd16 command. But I don't favour to use a feature of another bootloader (i.e. syslinux) to actually boot a disk image from grub2. Cheers, Fabian PS: Many other users have reported similar problems, e.g. <http://michael-prokop.at/blog/2009/05/25/boot-an-iso-via-grub2/#comment-14147> [1] http://www.finnix.org/Balder -- Package-specific info: *********************** BEGIN /proc/mounts /dev/disk/by-uuid/ff43013e-d698-4d97-a4f3-aad02610d17e / ext3 rw,relatime,errors=remount-ro,data=ordered 0 0 /dev/hda6 /home ext3 rw,relatime,errors=continue,data=ordered 0 0 *********************** END /proc/mounts *********************** BEGIN /boot/grub/device.map (hd0) /dev/hda *********************** END /boot/grub/device.map *********************** BEGIN /boot/grub/grub.cfg # # DO NOT EDIT THIS FILE # # It is automatically generated by /usr/sbin/grub-mkconfig using templates # from /etc/grub.d and settings from /etc/default/grub # ### BEGIN /etc/grub.d/00_header ### set default=0 insmod ext2 set root=(hd0,1) search --no-floppy --fs-uuid --set ff43013e-d698-4d97-a4f3-aad02610d17e if loadfont /usr/share/grub/unicode.pf2 ; then set gfxmode=640x480 insmod gfxterm insmod vbe if terminal_output gfxterm ; then true ; else # For backward compatibility with versions of terminal.mod that don't # understand terminal_output terminal gfxterm fi fi set locale_dir=/boot/grub/locale set lang=de insmod gettext set timeout=5 ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/05_debian_theme ### insmod ext2 set root=(hd0,1) search --no-floppy --fs-uuid --set ff43013e-d698-4d97-a4f3-aad02610d17e insmod png if background_image /boot/grub/moreblue-orbit-grub.png ; then set color_normal=black/black set color_highlight=magenta/black else set menu_color_normal=cyan/blue set menu_color_highlight=white/blue fi ### END /etc/grub.d/05_debian_theme ### ### BEGIN /etc/grub.d/10_linux ### menuentry "Debian GNU/Linux, with Linux 2.6.32-trunk-686" { insmod ext2 set root=(hd0,1) search --no-floppy --fs-uuid --set ff43013e-d698-4d97-a4f3-aad02610d17e linux /boot/vmlinuz-2.6.32-trunk-686 root=UUID=ff43013e-d698-4d97-a4f3-aad02610d17e ro quiet initrd /boot/initrd.img-2.6.32-trunk-686 } menuentry "Debian GNU/Linux, with Linux 2.6.32-trunk-686 (recovery mode)" { insmod ext2 set root=(hd0,1) search --no-floppy --fs-uuid --set ff43013e-d698-4d97-a4f3-aad02610d17e linux /boot/vmlinuz-2.6.32-trunk-686 root=UUID=ff43013e-d698-4d97-a4f3-aad02610d17e ro single initrd /boot/initrd.img-2.6.32-trunk-686 } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/22_invaders ### menuentry "GRUB Invaders" { insmod ext2 set root=(hd0,1) search --no-floppy --fs-uuid --set ff43013e-d698-4d97-a4f3-aad02610d17e multiboot /boot/invaders.exec } ### END /etc/grub.d/22_invaders ### ### BEGIN /etc/grub.d/24_balder ### menuentry "Balder 10 (FreeDOS 1.0)" { insmod ext2 set root=(hd0,1) search --no-floppy --fs-uuid --set ff43013e-d698-4d97-a4f3-aad02610d17e linux16 /usr/lib/syslinux/memdisk insmod ext2 set root=(hd0,1) search --no-floppy --fs-uuid --set ff43013e-d698-4d97-a4f3-aad02610d17e initrd16 /boot/balder10.img } ### END /etc/grub.d/24_balder ### ### BEGIN /etc/grub.d/30_os-prober ### ### END /etc/grub.d/30_os-prober ### ### BEGIN /etc/grub.d/40_custom ### # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. ### END /etc/grub.d/40_custom ### *********************** END /boot/grub/grub.cfg -- System Information: Debian Release: squeeze/sid APT prefers testing APT policy: (990, 'testing'), (550, 'unstable'), (400, 'experimental') Architecture: i386 (i686) Kernel: Linux 2.6.32-trunk-686 (SMP w/1 CPU core) Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages grub2 depends on: ii grub-pc 1.98~20100101-1 GRand Unified Bootloader, version grub2 recommends no packages. grub2 suggests no packages. -- debconf information: grub2/numbering_scheme_transition: -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
