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
On 8/3/20 2:21 AM, Jyrki Tikka wrote:> The boot disks must have an EFI boot partition even though it's not > used in this case.IIRC, they need a partition at the beginning of the drive to reserve space for GRUB2.? That should be a "BIOS boot partition" not an "EFI System partition" for GRUB2.? It's not used for a filesystem, but it is used to store GRUB2's second stage image.
On 2020-08-03 18:43, Gordon Messmer wrote:> On 8/3/20 2:21 AM, Jyrki Tikka wrote: >> The boot disks must have an EFI boot partition even though it's not >> used in this case. > > > IIRC, they need a partition at the beginning of the drive to reserve > space for GRUB2.? That should be a "BIOS boot partition" not an "EFI > System partition" for GRUB2.? It's not used for a filesystem, but it > is used to store GRUB2's second stage image.Yes, you are absolutely right. I'm away from home right now and I don't have access to my home systems. My memory failed me which is not unusual. <(*) Jyrki