Convert from Seabios to OVMF

[alturismo]

hi, just wanted to ask if thats possible, switched from Intel GPU to Nvidia and have some issues now, and as my my other VM running the nvidia was OVMF i guess it could help ...

 

i think i saw a guide howto do that, but cant find it anymore ...

 

may someone has a tip ?

 

its my main VM and setting all new up would be a pain ... should be last solution if possible

[alturismo]

ok, figured a solution for me, just in case someone else needs an tip

 

1st, make a backup of your vdisk file ... just in case

 

in windows 10 (1703+) there a new tool added, mbr2gpt

 

so, i used powershell in admin mode

 

mbr2gpt /validate /allowFullOS  <-- if ok then

mbr2gpt /convert /disk:0 /allowFullOS

 

now your win10 VM disk is prepared for EFI boot,.shut the VM down.

 

create a new win10 VM with your same settings (exept use OVMF instead seabios), pointing to your existing and edited vdisk1.img (or whatever name it has).

 

That was it ... enjoy

 

when all is good your can remove your backup from your vdisk ..

[Joseph]

On 12/18/2017 at 11:32 AM, alturismo said:

mbr2gpt /validate /allowFullOS  <-- if ok then

Hi alturismo, I'd like to do the same thing... however I got these results:

mbr2gpt : The term 'mbr2gpt' is not recognized as the name of a cmdlet, function, script file, or operable program.
Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:1
+ mbr2gpt /validate /allowFullOS
+ ~~~~~~~
    + CategoryInfo          : ObjectNotFound: (mbr2gpt:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

Any thoughts much appreciated.

[Joseph]

6 hours ago, Joseph said:

Any thoughts much appreciated.

Nevermind... updating to 1709

 

UPDATE:

The VM Updated, but now it won't boot. QEMU shows the UEFI shell and then exits to a Shell> prompt. Unless there's a simple fix, I'm thinking its just going to be easier to reinstall Win10 from scratch with the OVMF settings in the VM config.

[alturismo]

What happens when you exit the shell ?

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[Joseph]

7 hours ago, alturismo said:

What happens when you exit the shell ?

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Got it figured out. For some reason you have to go into the bios and change the boot order. Seems to me the VM should do that automatically.

[alturismo]

ok, i had this too when i was changing the existing VM xml instead creating a new VM setup pointing to the existing img.

 

Nice you got it working.

[Rudder2]

On 12/18/2017 at 11:32 AM, alturismo said:

ok, figured a solution for me, just in case someone else needs an tip

 

1st, make a backup of your vdisk file ... just in case

 

in windows 10 (1703+) there a new tool added, mbr2gpt

 

so, i used powershell in admin mode

 

mbr2gpt /validate /allowFullOS  <-- if ok then 

mbr2gpt /convert /disk:0 /allowFullOS 

 

now your win10 VM disk is prepared for EFI boot,.shut the VM down.

 

create a new win10 VM with your same settings (exept use OVMF instead seabios), pointing to your existing and edited vdisk1.img (or whatever name it has).

 

That was it ... enjoy

 

when all is good your can remove your backup from your vdisk ..

You are the man!  It still works perfectly!!

[alturismo]

Thank you

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[administrator]

On 12/18/2017 at 12:32 PM, alturismo said:

ok, figured a solution for me, just in case someone else needs an tip

 

1st, make a backup of your vdisk file ... just in case

 

in windows 10 (1703+) there a new tool added, mbr2gpt

 

so, i used powershell in admin mode

 

mbr2gpt /validate /allowFullOS  <-- if ok then

mbr2gpt /convert /disk:0 /allowFullOS

 

now your win10 VM disk is prepared for EFI boot,.shut the VM down.

 

create a new win10 VM with your same settings (exept use OVMF instead seabios), pointing to your existing and edited vdisk1.img (or whatever name it has).

 

That was it ... enjoy

 

when all is good your can remove your backup from your vdisk ..

Thanks for this information. Helped out a lot.

[alturismo]

3 hours ago, administrator said:

Thanks for this information. Helped out a lot.

u welcome