Hello Hao, On Thu, Jul 13, 2017 at 4:39 AM, Hao Lee <haolee.sw...@gmail.com> wrote:
> Hi, > > I encounter a problem when making a bootable disk image because GRUB > always enters a > rescue shell. > > I want to create a disk image and install GRUB 2 on it and then use > Bochs to run it. The steps are as follows. > > System Environment: > OS: Fedora 25 x86 > GRUB version: grub2-install (GRUB) 2.02~beta3 > Bochs version: 2.6.9 > > 1. Create a empty disk image. > > dd if=/dev/zero of=hd.img bs=$((16*63*512)) count=100 > > 2. Create a primary partition. > > fdisk -u -C100 -S63 -H16 hd.img > > The partition table is: > Device Boot Start End Sectors Size Id Type > hd.img1 2048 100799 98752 48.2M 83 Linux > > Hint: when you run: /usr/bin/file hd.img what do you see ? > 3. Attach the whole image to /dev/loop0 and attach the first partition > to /dev/loop1 > > sudo losetup /dev/loop0 hd.img > sudo losetup -o $((2048*512)) /dev/loop1 hd.img > > 4. Format the first partition to ext4 and mount it to /mnt/ > > sudo mkfs.ext4 /dev/loop1 > sudo mount -t ext4 /dev/loop1 /mnt > > 5. Create GRUB directory. > > sudo mkdir -p /mnt/boot/grub2 > > 6. Install GRUB 2 > > sudo grub2-install --boot-directory=/mnt/boot /dev/loop0 > 2nd hint: ask yourself does the grub *core.img" have the required module built-in by default ? > > 7. Start Bochs. > > bochs -f test.bxrc > > These steps are straight and simple. However, GRUB always enters a > rescue shell instead of entering normal mode. > When I use the set and ls command to show more information, I can only > see (hd0) and the first partition (hd0,1) is disappeared. The screen > output is as follows: > ---------------------------------------------------- > Bochs BIOS - build: 02/16/17 > ata0 master: Generic 1234 ATA-6 Hard-Disk ( 49 MBytes) > Press F12 for boot menu. > Booting from Hard Disk... > . > error: no such device: c5b2c483-70c2-4212-840b-da5f965d0555. > error: unknown filesystem. > Entering rescue mode... > grub rescue> set > prefix=(hd0)/boot/grub2 > root=hd0 > grub rescue> ls > (hd0) > grub rescue> > ---------------------------------------------------- > > Could someone help me out? Many thanks! > Yes *someone* can and will help you. Please watch till the very end. You will not be disappointed :) https://youtu.be/6oqTu8utMe4 Good luck and hope this helps - Aruna > > Regards, > Hao Lee > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@kernelnewbies.org > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies >
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