All PnP drivers must handle this IRP.
The PnP manager sends this IRP to notify the drivers for a device that the device is no longer available for I/O operations. This IRP is sent on Windows 2000 and later systems only.
The PnP manager sends this IRP before notifying user-mode applications or other kernel-mode components. After this IRP completes, the PnP manager notifies registered applications and drivers that the device has been removed.
The device can be in any PnP state when the PnP manager sends this IRP.
On Windows 98/Windows Me, the PnP manager does not send this IRP.
The PnP manager sends this IRP at IRQL = PASSIVE_LEVEL in the context of a system thread.
I/O Status Block
A driver must set Irp->IoStatus.Status to STATUS_SUCCESS. A driver must not fail this IRP.
This IRP is handled first by the driver at the top of the device stack and then passed down to each lower driver in the stack.
Sending This IRP
Reserved for system use. Drivers must not send this IRP.