Hello Hao,
On Thu, Jul 13, 2017 at 4:39 AM, Hao Lee <haolee.swjtu@xxxxxxxxx> 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 :)
Good luck and hope this helps - Aruna
Regards,
Hao Lee
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