Once upon a time, Jonathan Billings <billings at negate.org> said:> On Aug 2, 2020, at 14:43, Pete Biggs <pete at biggs.org.uk> wrote: > > You don't have to use UEFI secure booting - most machines can fall back > > to legacy booting using BIOS settings. If you do that, you won't use > > any Microsoft signed code. > > Back in 2017, Intel said that it was going to deprecate the ?Legacy? CSM by 2020. They might have changed their schedule but I suspect we?ll start seeing hardware without anything but UEFI.I believe that is still Intel's plan. However, as happens often, people are confusing UEFI and Secure Boot. UEFI is a replacement for the ages-old BIOS - Secure Boot is an extension to UEFI to create a "trusted" (for whatever that may mean) boot chain to get to the OS. You can have UEFI without having Secure Boot enabled (that's what I do on my systems). -- Chris Adams <linux at cmadams.net>
On Sun, Aug 2, 2020 at 7:14 PM Chris Adams <linux at cmadams.net> wrote:> Once upon a time, Jonathan Billings <billings at negate.org> said: > > On Aug 2, 2020, at 14:43, Pete Biggs <pete at biggs.org.uk> wrote: > > > You don't have to use UEFI secure booting - most machines can fall back > > > to legacy booting using BIOS settings. If you do that, you won't use > > > any Microsoft signed code. > > > > Back in 2017, Intel said that it was going to deprecate the ?Legacy? CSM > by 2020. They might have changed their schedule but I suspect we?ll start > seeing hardware without anything but UEFI. > > I believe that is still Intel's plan. > > However, as happens often, people are confusing UEFI and Secure Boot. > UEFI is a replacement for the ages-old BIOS - Secure Boot is an > extension to UEFI to create a "trusted" (for whatever that may mean) > boot chain to get to the OS. You can have UEFI without having Secure > Boot enabled (that's what I do on my systems). >Legacy BIOS has its own set of issues, like no GPT support, MBR disks are max 2TB. -- -john r pierce recycling used bits in santa cruz
On 2020-08-03 05:56, John Pierce wrote:> Legacy BIOS has its own set of issues, like no GPT support, MBR disks > are > max 2TB.I'm booting just fine on an old BIOS system from a pair (mdraid 1) of 3 TB GPT disks. The MBR compatibility on GPT disks allow the old machine to boot from a GPT disk and load GRUB. Then GRUB takes over and loads the kernel and the kernel has no problems understanding GPT disks. The boot disks must have an EFI boot partition even though it's not used in this case. -- <(*) Jyrki