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MMMMM
Tux's lil' helper
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Joined: 13 Jun 2011
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PostPosted: Sun Mar 04, 2018 12:59 pm    Post subject: UEFI dual boot Reply with quote

Hi,

I want to install Gentoo onto a drive where Win 10 is already present. Dual boot.

1st thing mentioned in https://wiki.gentoo.org/wiki/UEFI_Dual_boot_with_Windows_7/8 is to download SystemRescueCd:
http://www.system-rescue-cd.org/Download/

So far sourceforge seems to be broken, can't download anything. Are there mirrors? Which is the min. version I need?

BR, M.
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Jaglover
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PostPosted: Sun Mar 04, 2018 1:13 pm    Post subject: Reply with quote

Beta download works http://beta.system-rescue-cd.org/
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mike155
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PostPosted: Sun Mar 04, 2018 1:16 pm    Post subject: Reply with quote

Quote:
So far sourceforge seems to be broken

That seems to be true. I also get the message "Oh snap! We can't process this request."...

I don't know of any mirror. Maybe you should wait a couple of hours an retry?
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bammbamm808
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PostPosted: Mon Mar 05, 2018 5:38 am    Post subject: Reply with quote

When I did this with win8.1, I found it easiest to use the refind boot manager instead of grub2. Your results may vary depending on your uefi firmware and level of experience and patience.
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charles17
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PostPosted: Mon Mar 05, 2018 5:46 am    Post subject: Reply with quote

bammbamm808 wrote:
I found it easiest to use the refind boot manager instead of grub2. Your results may vary depending on your uefi firmware ...

UEFI should allow to go without an external bootloader, see https://wiki.gentoo.org/wiki/EFI_stub_kernel
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The Doctor
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PostPosted: Mon Mar 05, 2018 5:57 am    Post subject: Reply with quote

charles17 wrote:
UEFI should allow to go without an external bootloader, see https://wiki.gentoo.org/wiki/EFI_stub_kernel
++

UEFI specification includes a bootloader that is usually very well implemented. Just remember to kill secure boot and kill it again. Then drive a stake through its heart and shoot it with a silver bullet.
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skellr
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PostPosted: Wed Mar 07, 2018 9:59 pm    Post subject: Reply with quote

charles17 wrote:
bammbamm808 wrote:
I found it easiest to use the refind boot manager instead of grub2. Your results may vary depending on your uefi firmware ...

UEFI should allow to go without an external bootloader, see https://wiki.gentoo.org/wiki/EFI_stub_kernel

Yes, The issue of Windows overwriting the MBR with it's bootloader is soon to be forgotten. :)
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charles17
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PostPosted: Thu Mar 08, 2018 4:55 am    Post subject: Reply with quote

skellr wrote:
[Yes, The issue of Windows overwriting the MBR with it's bootloader is soon to be forgotten. :)

Of course. And now they are doing worse in the ESP:
https://wiki.gentoo.org/wiki/EFI_System_Partition#cite_note-1 wrote:
As described above, on a UEFI system bootloaders should be installed only in the correct vendor-specific directory in the EFI System Partition (ESP). But, because of the buggy firmware implementations out there, operating system distributors cannot necessarily expect that this will work correctly for all systems. Microsoft have worked around this (and arguably also made the problem worse) - the Windows installer also installs to the removable media path in the ESP (e.g. \EFI\boot\bootx64.efi for amd64/X64 systems). All firmware implentations have to use this path to be able to run an OS installer. This means that Windows will always work on all these broken implementations, but it also means that system vendors can get away with shipping broken implementations. It removes the idea of having a fallback boot path and sensible control of boot order.
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