On Wed, Mar 23, 2016 at 7:49 PM, Dmitry Guryanov <dgurya...@mirantis.com> wrote:
> > I have no objections against clearing bios boot partition, but could > you describe scenario, how non-efi system will boot with valid > BIOS_grub and wiped boot code in MBR > I thoroughly agree that it's impossible to boot without stage1 from the disk for non-uefi system. Besides, it doesn't mean what we shouldn't wipe dedicated BIOS_grub partition. But... How about network booting over PXE? I'm not quire sure if it's still technically possible. I read that stage1 just contains of LBA48 pointer to the stage1.5 or stage2. So, i can imagine a case when somebody has tweaked PXE loader so it will be jumping to predefined LBA48 pointer where stage1.5/2 resides absolutely bypassing stage1. I knew that partitioning layout for the first 2 partitions is always the same for all target nodes. The actual value of the partitioning boundaries may slightly vary due to partition boundaries alignment depending on the h/w itself. If all nodes were equipped with the identical h/w (which is almost true for real deployments), then BIOS_grub partition resides under the same LBA48 pointer for all nodes. So, even it may be sounded too tricky and requires a lot of manual steps, but it's still possible. No? Did I miss something?
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