Hi list, Maybe I'm missing something basic, but how do I install grub (preferably grub2) on an HD image that will later be used as an hd0 on a Flash IDE adapter?
Here's what I'm trying to do (the real script is at <http://angg.twu.net/e/plurall.e.html#loop-fdisk-mke2fs>): --snip--snip-- # Create a zeroed HD image with 20MB rm -v /tmp/test.img dd if=/dev/zero of=/tmp/test.img bs=1M count=20 # Create two primary partitions: 1st=4M, 2nd=16MB sudo fdisk -C 20 -H 64 -S 32 /tmp/test.img n p 1 4 n p 2 20 u p w # Some notes about how to get the offsets for "losetup -o", # and the sizes of the partitions for mke2fs... # (find-sh "echo -e 'u\\np\\nq' | sudo fdisk /tmp/test.img") # 64 heads, 32 sectors/track, 0 cylinders, total 0 sectors # Units = sectors of 1 * 512 = 512 bytes # Device Boot Start End Blocks Id System # /tmp/test.img1 32 8191 4080 83 Linux # /tmp/test.img2 8192 40959 16384 83 Linux # Sizes, in 512-byte blocks: # (list "/tmp/test.img1" (+ -32 8191 1) (* 4080 2)) # (list "/tmp/test.img2" (+ -8192 40959 1) (* 16384 2)) # Associate the full image to a loop device # (grub-setup may need this) sudo losetup -f | tee /tmp/test.dev0 sudo losetup $(cat /tmp/test.dev0) /tmp/test.img # Associate the first partition to a loop device, # clear it, make an ext2 filesystem there, mount it. sudo losetup -f | tee /tmp/test.dev1 sudo losetup -o $[512*32] $(cat /tmp/test.dev1) /tmp/test.img sudo dd if=/dev/zero of=$(cat /tmp/test.dev1) bs=1024 count=4080 sudo mke2fs -b 1024 -v $(cat /tmp/test.dev1) 4080 mkdir /tmp/dev1 sudo mount -o loop $(cat /tmp/test.dev1) /tmp/dev1 # Associate the second partition to a loop device, # clear it, make an ext2 filesystem there, mount it. sudo losetup -f | tee /tmp/test.dev2 sudo losetup -o $[512*8192] $(cat /tmp/test.dev2) /tmp/test.img sudo dd if=/dev/zero of=$(cat /tmp/test.dev2) bs=1024 count=16384 sudo mke2fs -b 1024 -v $(cat /tmp/test.dev2) 16384 mkdir /tmp/dev2 sudo mount -o loop $(cat /tmp/test.dev2) /tmp/dev2 df # Now copy the grub files to /tmp/dev1/boot/grub/ # and install grub on MBR of the HD image. # (Omitted - my attempts to install grub on the image have failed!...) # Umount, release loop devices sudo umount /tmp/dev1 sudo umount /tmp/dev2 sudo losetup -d $(cat /tmp/test.dev2) 2>&1 > /dev/null sudo losetup -d $(cat /tmp/test.dev1) 2>&1 > /dev/null sudo losetup -d $(cat /tmp/test.dev0) 2>&1 > /dev/null --snip--snip-- By the way, after installing grub on the image the next steps are: * try to boot from that HD image with qemu, * make sure that grub recognizes the two partitions, * extract a linux kernel and an initrd from a certain liveCD (http://www.devil-linux.org/) and put them in the first partition, * enlarge the HD size to 256MB, * copy the CD image to the second partition (so that it cease to be ext2 and will become a compressed iso) * change the /linuxrc onthe initrd to make it start an interactive shell, * use that shell to mount (manually) the CD image from /dev/hda2 instead of from a CD device, and then try to run pivotroot into it to run the liveCD, * change the CD detection functions in the /linuxrc script to make them handle a boot parameter like "cddevice=/dev/hda2". If this works well then we will be able to run small liveCD images (Devil Linux is ~ 200MB) on scrap machines that have no CD drive and no HD, just by putting a 256MB flash IDE adapter on them... Cheers, Eduardo Ochs [EMAIL PROTECTED] http://angg.twu.net/ _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel
