setup-storage and GPT partition tables with EFI boot partition

[Kerim Gueney]

Hi Ulrich,

thank you for your input!

I used the flag "bios_grub" because of 
https://www.gnu.org/software/grub/manual/html_node/BIOS-installation.html , 
you're right about it not being exactly correct.

Thomas suggested "efi", it's his decision to choose which term to use.

I have only very limited experience (honestly, none - I don't use it) 
with GPT and as such rely on information from others. We hadn't realized 
the redundancy of the feature and it seems to be the case for a few 
people on the mailing list who use GPT. I'm guessing that there is some 
lack of documentation or not enough clarity or something. Either way, 
we'll look into it.

Again, thank you, much appreciated.

Best
Kerim

On 06.07.2015 21:55, Ulrich Zehl wrote:
> Hi!
>
> First of all, I was previously not subscribed to this list, so please
> excuse any broken references.
>
> Kerim Gueney wrote:
>> Do note the new "efi" partition type. It applies the vFAT filesystem
>> onto the partition and sets the partition type to EFI System Partition.
>>
>> We'd appreciate it, if you guys could test it and reported any bugs you
>> encounter.
> I have some remarks, and one bug report.
>
> To create an EFI System partition (ESP; gdisk partition type EF00) with
> parted, you need to set a partition's "boot" flag (see [0]). The bug is:
> The new code sets a partition's "bios_grub" flag, resulting in (gdisk)
> partition type EF02.
>
> Also, I feel that "esp" is a better identifier than "efi", as the former
> abbreviation appears in other literature and seems less ambiguous.
>
> I have attached a patch that addresses these issues (based on
> 2dadbeeaddaa7f6c778146ad35782281de5b074d rather than HEAD because I feel it
> shows the differences better). Please feel free to use it if you find it
> helpful.
>
> Additionally, I want to point out that you can create an EFI System
> partition without the new feature with the "bootable:<number>" disk option,
> like so:
>
> disk_config disk1 disklabel:gpt fstabkey:uuid bootable:1
> primary         /boot/efi        200            vfat    rw
> [...]
>
> Regards,
> Ulrich
>
> [0] https://wiki.archlinux.org/index.php/Unified_Extensible_Firmware_Interface#GPT_partitioned_disks