Also on Debian based systems
Also on Debian based systems
Posted Aug 2, 2020 6:05 UTC (Sun) by kreijack (guest, #43513)In reply to: Also on Debian based systems by anselm
Parent article: Grub2 updates for Red Hat systems are making some unbootable
> Theoretically, GPT-partitioned disks have a fake MBR with one huge untouchable “partition” that covers all the space within the GPT
> partitions. (This only gets you so far if your disk is bigger than MBR will support.)
> partitions. (This only gets you so far if your disk is bigger than MBR will support.)
Correct.
To complete the answer, I have to point out that below of the "MBR" label there are two kind if information:
- the partition table
- the boot loader
Both are stored in the first sector. Grub-install change only the latter. So in any case grub-installer can't change nor damage the GPT table. However installing a MBR boot loader, could start the bios in legacy mode (and not uefi one).