Re: Yet another UEFI/BIOS question
Hi Pascal,
Thank you for your answer
Le 19-09-2018, à 23:30:40 +0200, Pascal Hambourg a écrit :
Le 19/09/2018 à 16:50, steve a écrit :
Googling around, I suspect that these errors come from the fact that the
BIOS is configured to but in Legacy mode (aka Bios mode) rather than in
the more modern UEFI mode. Just an hypothesis.
But the problem is that my old sdd's have all (except /dev/sdd,
which I just noticed) a msdos partition table:
So what ?
Nothing, I just noticed that while writing my message.
Partition Table: gpt
1 1049kB 524MB 523MB ntfs Basic data partition
2 524MB 629MB 105MB fat32 EFI system partition
3 629MB 646MB 16.8MB Microsoft reserved
partition 4 646MB 250GB 249GB ntfs Basic data
partition
Grub-pc is currently installed on /dev/sda1 (/boot) and /dev/sda.
(...)
My questions are rather simple. Is it conceivable to convert the
sdd's to gpt partition table (...) so I can switch my BIOS to UEFI?
You don't need to convert anything. UEFI can use DOS partition tables.
I know since that's what I'm currently doing. But as mentioned in my
first message, I suspect the ACPI issues arising during boot time might
be linked to that fact. So that's why I'd like to try to be 100% UEFI
compliant.
All you need is an EFI system partition. As you can see above, Windows
already created one. You can mount it on /boot/efi and install GRUB
EFI.
Do you mean that I can use the Windows disk to dual boot and leave alone
the sda disk where I have the GNU/Linux system installed on?
Note that registering GRUB into the UEFI boot variables requires to
boot in EFI mode. You can do it with a Debian installation or live
image.
Does that mean that I cannot
1) mount /boot/efi on windows disk on Debian's /mnt
2) install grub-efi on it
3) shutdown
4) modify the BIOS to load only in UEFI mode
5) reboot
Thanks,
Steve
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