Hi...
On Sun, Jun 21, 2009 at 5:31 AM, soumen
acharya<soumen.acharya@xxxxxxxxxxx> wrote:
>
>
> Hi all,
>
> I was trying to boot linux kernel with qemu using custom busybox , having
> booting problem.
>
> I did the following :
>
> dd if=/dev/zero of=rootfs.img bs=1k count=2048
> mkfs.ext2 i 1024 F rootfs.img
> mkdir /mnt/rootfs
> mount o loop rootfs.img /mnt/rootfs
> rsync a busybox/_install/ /mnt/rootfs/
> chown R root:root /mnt/rootfs/
> sync
> qemu -m 64 -hda rootfs.img -kernel linux2.6.28.4/arch/x86/boot
> /bzImage -append "root=/dev/hda"
>
> while booting it shows:
>
> VFS : can not open hda
> append proper root fs in "root="
AFAIK, qemu expect the image file you put in "-hda" or "-hdb" as a
complete disk, not just a single partition. Since you're doing mkfs on
the image file, that means you made it as if it's a single partition.
Use parted or fdisk to create disk label and partition inside that disk image:
# dd if=/dev/zero of=./test.img bs=1k count=10k
# /sbin/parted ./test.img
(parted) mklabel msdos
(parted) mkpartfs primary
File system type? [ext2]?
Start? 0
End? 10M
(parted) p
Model: (file)
Disk /home/mulyadi/Virtual/test.img: 10.5MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 16.4kB 10.5MB 10.5MB primary ext2
Then simply loop mount the first partition of that first partition:
# /sbin/fdisk -u -l ./test.img
Disk ./test.img: 0 MB, 0 bytes
4 heads, 32 sectors/track, 0 cylinders, total 0 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x0006e46d
Device Boot Start End Blocks Id System
./test.img1 32 20479 10224 83 Linux
# mount -o loop,offset=$((32*512)) ./test.img /mnt/test
regards,
Mulyadi.
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