Re: [Qemu-discuss] Run qemu with /dev/sda ?

[Narcis Garcia]

Right; guest write operations will affect only $DISK pointed file.


El 18/04/16 a les 21:42, Ran Shalit ha escrit:
> On Mon, Apr 18, 2016 at 10:36 PM, Peter Maydell
> <address@hidden> wrote:
>> On 18 April 2016 at 20:17, Ran Shalit <address@hidden> wrote:
>>> I probably have some misunderstanding with running qemu.
>>> 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:
>>>
>>> KERNEL="bzImage"
>>> DISK="rootfs.i686.ext2"
>>>
>>> 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 ?
>>> Isn't it dangerous ?
>>
>> QEMU isn't using the same disk as the host: this command line
>> says "your first hard disk should be emulated using the
>> rootfs.i686.ext2 image file". So the guest won't be making
>> raw accesses to the same hard disk the host is using.
>>
> 
> So I should expect the file rootfs.i686.ext2 to be modified every time
> after doing something in guest OS, Right ?
> I mean that writing to root filesystem will result in slightly
> different in rootfs.i686.ext2 after quiting qemu.
> 
> Thanks,
> Ran
>