CODEWITHSUNDEEP
windowsdevicedevice-driverhardware-interface
geek
geek

Reputation: 2847

difference between device id and pnp device id

can somebody please explain difference between those two terms, when I'm trying to print

structs from Win32_AllocatedResource() I can find pnp device id (something like PCI\\VEN_...) and when I'm trying to print structs from Win32_IDEControllerDevice() I can find device id (something like IDE\\CDROM...)

but what is the difference why do I need both of them? thanks in advance

Upvotes: 1

Views: 2165

Answers (1)

RolKau
RolKau

Reputation: 1822

Win32_AllocatedResource gives you the assignment of a given resource (e.g. a DMA starting address) to some "device" (or "object"), which when ResultClass = Win32_IDEController, is the controller.

Win32_IDEControllerDevice gives you the list of "devices" (or "object") that are connected to a certain controller, the Antecedent key is the DeviceID of the controller whereas the Dependent key is the DeviceID of the storage unit.

Upvotes: 1

Related Questions