Hi, edk2. I would be glad to clarify one thing. When I request all handles, on which Block IO protocol (BIOP) is installed (through LocateHandleBuffer(ByProtocol), and then open Device Path protocol (DPP) on every of them to see what devices support BIOP, I don't see ones, that should represent the whole physical (raw) disk. In other words, there are no devices, whose DP would end with 4.1 Type.SubType node _and_ partition number n == 0, this is what the spec suggests as a way of representing the whole (raw) disk (as opposite to a partition, on which n =/= 0). Instead, I am getting BIOP instances on devices, whose DP ends at the level before, a parent device that is, for example, say 3.1 (Messaging.ATAPI). These are supposedly for representing the whole (raw) disk? because there are no other thing being that. E.g. if I have a harddisk with MBR and one partition on it, the DP for the partition device, supporting BIOP, would be something like:
PciRoot(0)\Pci(0, 0)\Ata(0)\HD(1, MBR, sign, start, size) But there wouldn't be a device enumerated like: PciRoot(0)\Pci(0, 0)\Ata(0)\HD(0,MBR, sign) Instead, there would be one like this: PciRoot(0)\Pci(0, 0)\Ata(0) the question is: what DP the specification defines to represent a whole (raw) disk? 1) the one, ending with 4.1 Type.SubType and partition number n == 0 2) the DP of the parent of any partition, residing on it, for example the one, ending with 3.1 Type.SubType Thank you. -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#86128): https://edk2.groups.io/g/devel/message/86128 Mute This Topic: https://groups.io/mt/88735432/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
