gudt/docs/D5_boot.md

Boot Partition

Node format

Offset	Size	Description
0	1	type = 0xd5
1	1	flags = 0x13
2	2	parent node = 0
4	4	must be zero
8	8	first part of boot partition's UUID
16	1	type = 0xd5
17	1	flags = 0x13
18	2	parent node = 0
20	4	must be zero
24	8	second part of boot partition's UUID

This node should not appear in GUDT blobs on disk, rather it is added by the boot loader before it passes the GUDT to a kernel. It always has two nodes and contains inlined qword data, the UniquePartitionGUID field in the GPT of the boot partition. If the booting does not use a GUID Partitioning Table, then it must be generated as 54524150-(device code)-(partition number)-616F6F7400000000.

JSON format

{
    "type": "BOOT",
    "parent": 0,
    "unit": "qword",
    "data": [ (number) first part, (number) second part ]
}