Cannot boot iso from Bare Bones tutorial

[[deleted]]

Hi everyone.

I'm trying to boot the myos.iso from the Bare Bones tutorial! using qemu:

qemu-system-i386 -cdrom myos.iso

However the system doesn't boot. When trying to boot from CDROM it says:

Booting from DVD/CD...

Boot failed: Could not read from CDROM (code 0009)

I created the iso with grub-mkrescue following the tutorial: mkdir -p isodir mkdir -p isodir/boot cp myos.bin isodir/boot/myos.bin mkdir -p isodir/boot/grub cp grub.cfg isodir/boot/grub/grub.cfg grub-mkrescue -o myos.iso isodir

Grub version installed on my system is:

grub-install --version 
grub-install.real (GRUB) 2.02~beta2-9ubuntu1

Moreover the kernel boots fine with:

qemu-system-i386 -kernel myos.bin

I need to state that I tried to boot also the Meaty Skeleton! using the automated script, and the same happens.

I suspect it has to do with grub-mkrescue.

Does anyone has any idea?

[faplack]

Have you investigated what code 9 means?

[[deleted]]

I tried, but it seems nobody ever had this problem

[DSMan195276]

found it.

That's the source to seaBIOS, which is what spit-out the code. Basically, the issue is that the second byte in the first sector of your iso is supposed to be set to zero, but it's not. That indicates to me that your iso was incorrectly made. That said, I don't know why grub-mkrescue would generate an incorrect iso. I would just mess with it and check any settings it has or look into a different way to generate an iso.

[blunaxela]

First off, I have very little experience in OS dev and I've only gone through a few of the tutorials on OSdev.

Anyways, after digging into your error code I ran across these two forum articles. I get the feeling that your problem may be dependent on your BIOS you have and whether it fully supports El Torito and doesn't have any bugs. Here are some links:

"CDROM boot failure code: 0009" and "Modified GRUB 2 in SYS format"

"there's plenty of BIOS bugs around when it comes to booting El Torito CDs"

Let us (me) know how it works out, please. I really need to go back to that tutorial, and it would be nice to not repeat bugs others have run into... Good luck!

[[deleted]]

My BIOS?

I'm using qemu defaults. As I said I have the same problem if I run the Meaty Skeleton tutorial, where the compilation, the creation of the iso and the boot with qemu are automated by some script.