[Buildroot] Run qemu with /dev/sda ?

[Ran Shalit]

On Mon, Apr 18, 2016 at 10:18 PM, Thomas Petazzoni
<thomas.petazzoni at free-electrons.com> wrote:
> Hello,
>
> On Mon, 18 Apr 2016 18:32:22 +0300, Ran Shalit wrote:
>
>> I probably have some misunderstanding with running qemu with buildroot output.
>> I see in the following link:
>> http://www.osadl.org/Use-BuildRoot-to-create-a-Linux-image-fo.buildroot-qemu.0.html
>> that qemu should be run as following:
>
> Please read board/qemu/*/readme.txt to learn how to start Qemu to use
> the Qemu Buildroot defconfigs.
>
>> qemu-system-i386 -kernel $LOCATION/$KERNEL \
>> -hda $LOCATION/$DISK \
>> -boot c \
>> -m 128 \
>> -append "root=/dev/sda rw" \
>> -localtime \
>> -no-reboot \
>> -name rtlinux \
>> -net nic -net user \
>> -redir tcp:2222::22 \
>> -redir tcp:3333::3333
>>
>> But how can it be that qemu use the same disk as the host ?
>
> It doesn't use the same disk as the host. The /dev/sda disk that the
> system running inside Qemu sees is emulated. The contents of the
> emulated /dev/sda are the ones of the file passed as argument to the
> -hda option.
>
> Best regards,
>
> Thomas
> --

I now understand.
Thanks!
Ran