Dear Arseny, On 2019-11-28 15:10, Arseny Maslennikov wrote: > On Wed, Nov 27, 2019 at 01:13:52PM +0100, Lennart Poettering wrote: >> On Mi, 27.11.19 12:43, Paul Menzel (pmenzel+systemd-devel@xxxxxxxxxxxxx) wrote: >> >>> Dear systemd folks, >>> >>> A partition type GUID [1] for the partition to be mounted under `/boot` >>> when started with Linux would be nice. For example, there is already one >>> for FreeBSD /boot [2]. >>> >>> As you seem to have requested one for the freedesktop.org shared boot >>> loader partition already, could you please share the application process >>> for such a partition type GUID? >> >> The great thing about UUIDs are that they are an unmanaged >> namespace. Anyone can pick one, as long they generate them properly >> (which today means pulling from a good /dev/urandom). >> >> Hence there's no requesting or registration, you just pick one, >> that's it. >> >> I don't know what you expect /boot to be. In the systemd context we >> defined the "extended boot loader partition", which is a place you can >> place kernels and stuff, if you don't want to use the EFI ESP for >> that, and sd-boot and our userspace tools look in it too. It's >> automatically discovered and mounted to /boot if it exists, by >> systemd-gpt-auto-generator. >> >> This extended boot loader partition as GPT type UUID >> bc13c2ff-59e6-4262-a352-b275fd6f7172 and that's documented in the >> systemd-gpt-auto-generator(8) man page. > > The spec at freedesktop.org[1], (naturally) being the first Google hit > for "discoverable partitions spec" and also being referred to from a lot > of places all over the community[2][3][4][5][6], has no mention of the > extended boot loader partition. > I did not find it at systemd.io (which is, AFAIK, generated from the > source). > Is the page unmaintained? If it is: was it moved? are there any > official, maintained pages for the spec visible and citable on the web? Isn’t it [7]? > Otherwise, if the OS is installed on a disk with GPT disk label, and > if the ESP partition already exists but is too small, a new suitably > sized (let’s say 500MB) partition with GPT type GUID of > bc13c2ff-59e6-4262-a352-b275fd6f7172 shall be created and it should > be used as $BOOT. Do you mean the term is missing there? Kind regards, Paul > [1]https://www.freedesktop.org/wiki/Specifications/DiscoverablePartitionsSpec/ > > [2]https://forum.manjaro.org/t/discoverable-partitions-specification/104505 > [3]https://lists.freedesktop.org/archives/systemd-devel/2014-March/017817.html > [4]https://en.wikipedia.org/wiki/GUID_Partition_Table > [5]https://www.freedesktop.org/software/systemd/man/systemd-gpt-auto-generator.html > [6]https://wiki.archlinux.org/index.php/GPT_fdisk [7]: https://systemd.io/BOOT_LOADER_SPECIFICATION
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