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Full Discussion: QEMU not booting my image
Special Forums Hardware Filesystems, Disks and Memory QEMU not booting my image Post 302487797 by neur0n on Thursday 13th of January 2011 03:06:53 PM
Old 01-13-2011
In 'menuconfig' I think you're suppose to press the left arrow to go back. But anyways I think I figured out what the problem was. I used a block count of 8640:
Code:
dd if=/dev/zero of=kernel.img bs=512 count=8640

which is not the usual block count for a floppy. Perhaps this is what cause the problem. Because after I went back and used the example disk on the site like you said, I decided to use the block count they recommended (2880) and it worked. The only thing however, is that my project is over 3MB which means I need a lot more than 1.44MB. I was thinking about changing the settings in the grub commands but I'm not sure if they would work. Here is my intended setup:
Code:
$cat <<EOF | /sbin/grub --batch --device-map=/dev/null 
>device (hd0) /dev/loop0
>root (hd0)
>setup (hd0)
>quit
>EOF

instead of
Code:
$cat <<EOF | /sbin/grub --batch --device-map=/dev/null 
>device (fd0) /dev/loop0
>root (fd0)
>setup (fd0)
>quit
>EOF

the idea in my head is that if grub is looking for a floppy it looks for a 1.44MB image, so if it is looking for a harddrive then it looks for a random size image Smilie

---------- Post updated at 04:06 PM ---------- Previous update was at 03:48 PM ----------

By the way, when the image boot it says
Code:
Error 13: Invalid executable

This just mean that the executable is not compatible with my processor right? Because the example disk I downloaded was for Pentium 3 but my processor is a Pentium 4.
I simply booted the image using
Code:
qemu -fda the_image.img


Last edited by neur0n; 01-14-2011 at 04:15 PM..
 

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GRUB-MKRESCUE(1)						   User Commands						  GRUB-MKRESCUE(1)

NAME
grub-mkrescue - make a GRUB rescue image SYNOPSIS
grub-mkrescue [OPTION...] [OPTION] SOURCE... DESCRIPTION
Make GRUB CD-ROM, disk, pendrive and floppy bootable image. --compress=no|xz|gz|lzo compress GRUB files [optional] -d, --directory=DIR use images and modules under DIR [default=/usr/lib/grub/<platform>] --fonts=FONTS install FONTS [default=unicode] --install-modules=MODULES install only MODULES and their dependencies [default=all] -k, --pubkey=FILE embed FILE as public key for signature checking --locale-directory=DIR use translations under DIR [default=/usr/share/locale] --locales=LOCALES install only LOCALES [default=all] --modules=MODULES pre-load specified modules MODULES --themes=THEMES install THEMES [default=starfield] -v, --verbose print verbose messages. --arcs-boot enable ARCS (big-endian mips machines, mostly SGI) boot. Disables HFS+, APM, sparc64 and boot as disk image for i386-pc --core-compress=xz|none|auto choose the compression to use for core image --label-bgcolor=COLOR use COLOR for label background --label-color=COLOR use COLOR for label --label-font=FILE use FILE as font for label -o, --output=FILE save output in FILE [required] --product-name=STRING use STRING as product name --product-version=STRING use STRING as product version --rom-directory=DIR save ROM images in DIR [optional] --sparc-boot enable sparc boot. Disables HFS+, APM, ARCS and boot as disk image for i386-pc --xorriso=FILE use FILE as xorriso [optional] -?, --help give this help list --usage give a short usage message -V, --version print program version Mandatory or optional arguments to long options are also mandatory or optional for any corresponding short options. Generates a bootable CD/USB/floppy image. Arguments other than options to this program are passed to xorriso, and indicate source files, source directories, or any of the mkisofs options listed by the output of `xorriso -as mkisofs -help'. Option -- switches to native xorriso command mode. Mail xorriso support requests to <bug-xorriso@gnu.org>. REPORTING BUGS
Report bugs to <bug-grub@gnu.org>. SEE ALSO
grub-mkimage(1) The full documentation for grub-mkrescue is maintained as a Texinfo manual. If the info and grub-mkrescue programs are properly installed at your site, the command info grub-mkrescue should give you access to the complete manual. grub-mkrescue (GRUB) 2.02-2ubuntu8.3 July 2018 GRUB-MKRESCUE(1)
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