Partition Disk cloning using dd to KVM with UEFI -> BSOD! or nothing

Partition Disk cloning using dd to KVM with UEFI -> BSOD! or nothing

[Ben]

Hi,

I have read a good documentation
(http://fds-team.de/cms/articles/2013-12/use-a-real-windows-7-partition-in-virtualbox-kvm-vmware-player-u.html)
explaining how to use a physical disk/partition and clone it to KVM image.
I am wondering if someone has some how-to with an UEFI partition?

My objective is to clone a partition of Windows 7 from a physical disk.
(not the entire disk as it is a 256GB disk and my disk on my host is as
well a 256GB so I would not get a byte of free space doing that! only
need to clone the root partition of Windows which is around 80GB).

When I plug the disk into my host, I tried a

|dd if=/dev/sda2 of=image.raw bs=512|

(where /dev/sda2 is my 80GB Windows Partition).

If I tried to do a

|qemu-system-x86_64 -enable-kvm -vnc :0 -k fr image.raw|

But my KVM is told me

|Booting from Hard Disk...|

and nothing more!

I have installed OVMF and tried with -L option but I don't succeed.
I already know that it is not ideal (because of drivers and lot of other
reasons) to do that but the Windows installation is made by my company
and I would like to not loose it..

Many thanks for your help!

belette

Re: Partition Disk cloning using dd to KVM with UEFI -> BSOD! or nothing

[Mauricio Tavares]

On Fri, Mar 6, 2015 at 12:13 PM, Ben <benoitne@gmail.com> wrote:
> Hi,
>
> I have read a good documentation
> (http://fds-team.de/cms/articles/2013-12/use-a-real-windows-7-partition-in-virtualbox-kvm-vmware-player-u.html)
> explaining how to use a physical disk/partition and clone it to KVM image.
> I am wondering if someone has some how-to with an UEFI partition?
>
> My objective is to clone a partition of Windows 7 from a physical disk.
> (not the entire disk as it is a 256GB disk and my disk on my host is as
> well a 256GB so I would not get a byte of free space doing that! only
> need to clone the root partition of Windows which is around 80GB).
>
> When I plug the disk into my host, I tried a
>
> |dd if=/dev/sda2 of=image.raw bs=512|
>
> (where /dev/sda2 is my 80GB Windows Partition).
>
> If I tried to do a
>
> |qemu-system-x86_64 -enable-kvm -vnc :0 -k fr image.raw|
>
> But my KVM is told me
>
> |Booting from Hard Disk...|
>
> and nothing more!
>
      Don't you have to copy the first few sectors of the hard drive?

> I have installed OVMF and tried with -L option but I don't succeed.
> I already know that it is not ideal (because of drivers and lot of other
> reasons) to do that but the Windows installation is made by my company
> and I would like to not loose it..
>
> Many thanks for your help!
>
> belette
>
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Re: Partition Disk cloning using dd to KVM with UEFI -> BSOD! or nothing

[Paolo Bonzini]

On 06/03/2015 18:29, Mauricio Tavares wrote:
>> > My objective is to clone a partition of Windows 7 from a physical disk.
>> > (not the entire disk as it is a 256GB disk and my disk on my host is as
>> > well a 256GB so I would not get a byte of free space doing that! only
>> > need to clone the root partition of Windows which is around 80GB).
>> >
>> > When I plug the disk into my host, I tried a
>> >
>> > |dd if=/dev/sda2 of=image.raw bs=512|
>> >
>> > (where /dev/sda2 is my 80GB Windows Partition).
>> >
>> > If I tried to do a
>> >
>> > |qemu-system-x86_64 -enable-kvm -vnc :0 -k fr image.raw|
>> >
>> > But my KVM is told me
>> >
>> > |Booting from Hard Disk...|
>> >
>> > and nothing more!
>> >
>       Don't you have to copy the first few sectors of the hard drive?
> 

Yes, and for UEFI you also need to copy the EFI system partition.

Paolo