I would like to set up a multi-boot system on my laptop, which should offer the following function.
Windows Boot Manager for Windows 10 and Windows 10 Insider
As well as GRUB for the Linux installations
Now to my question: Can I install both GRUB and the Windows Boot Manager (already on the EFI system partition) in the EFI system partition and then use it in parallel, as described in the scenario above?
I think so. Whereby you should consider individual components yet.
Which, for example?
So I already did it. A hdd you should defragment before. And just do not delete a windows partition.
I should be surprised if more than one bootloader per partition can be started. I would not rule it out, but fear that two systems residing on the same partition will kill each other.
But you can easily install a separate bootloader for the installed system on each partition. This is even necessary for systems that are not their own bootloaders (which are primitive systems like MS-DOS from today's perspective).
A boot manager - a program that lets you choose which partition to boot from - you do not need that, it's included in the UEFI.
See https://www.com-magazin.de/praxis/bios/mehrere-systeme-uefi-pcs-installieren-192812.html
So it would work if GRUB installed on the EFI partition where the Windows Boot Manager is already located? Do you have your own experiences?
Yes, with UEFI any number of 'bootloaders' can reside in the same partition because they are simply files in the file system.
Each of them then simply gets an entry in the NVRAM, so that the UEFI bootloader launches the desired boot loader.
Have heard something like that, but wanted to ask again for security reasons
BootCurrent: 0000
Timeout: 1 seconds
BootOrder: 0000,0004,0005,0001,0007,0006
Boot0000 * Gentoo (Leg 1)
Boot0001 * Gentoo (Leg 2)
Boot0004 * UEFI: Built-in EFI Shell
Boot0005 * UEFI: KingstonDataTraveler 3.0PMAP
That's how it might look. If I press the button for the UEFI bootloader popup during boot, I get these entries as a selection list, otherwise I try them out according to the BootOrder.
Okay I got it
Especially the partitioning of the GRUB controls should be contrary to the Windows boot manager, because otherwise the concluded partitions do not correlate with each other. But do you have to know?
