Re: Is it possible to dual-boot both MBR & GPT without changing BIOS settings on laptop
Paul <[email protected]>
| Newsgroups | alt.os.linux,uk.comp.os.linux,alt.comp.microsoft.windows,alt.comp.os.windows-11 |
|---|---|
| Organization | A noiseless patient Spider |
| Message-ID | <[email protected]> |
On Sat, 11/15/2025 10:01 AM, Java Jive wrote:
> On 2025-11-15 13:51, Carlos E.R. wrote:
>> On 2025-11-15 02:57, Java Jive wrote:
>>> On 2025-11-11 13:19, Java Jive wrote:
>>>>
>>>> On 2025-11-11 03:45, Paul wrote:
>>>>>
>>>>> On Mon, 11/10/2025 7:27 PM, Java Jive wrote:
>>>>>>
>>>>>> Perhaps next I might try seeing if I can boot W11P from the original MBR menu, which would achieve the desired state of only needing one boot menu.
>>>>
>>>> Had a go at that meantime, couldn't get it to work.
>>>
>>> Still no success with this business of trying to boot Win11P on a GPT disk from Grub launched from an MBR disk. This is what I've tried ...
>>
>> Maybe using os-probe from the first disk, it would find the W11 and create an stanza.
>
> Running 'update-grub' produces two entries, one for each set of UEFI boot files in /dev/sdc{1,2}, and both entries are similar to the one already quoted, except that both insert a drivemap command and use chainloader +1, so both reboot the PC.
>
Would this process go any easier, if the controlling disk was
a UEFI one, and the only tricky chainloading it had to do was
an MBR one ?
I have a copy of the Supergrub disc, and it appears to only
support UEFI booting, as if MBR booting would not be sufficient.
Name: supergrub2-2.06s4-multiarch-USB.img.zip
Size: 24206301 bytes (23 MiB)
SHA256: 3F690588C5DBE80A9186818F5AA7B7566D4F2DC079F0FD9D06961F62DE0D7A0D
Paul