VOID
RamDiskEvtIoDeviceControl(
    IN WDFQUEUE Queue,
    IN WDFREQUEST Request,
    IN size_t OutputBufferLength,
    IN size_t InputBufferLength,
    IN ULONG IoControlCode
    )
{
    NTSTATUS          Status = STATUS_INVALID_DEVICE_REQUEST;
    ULONG_PTR         information = 0;
    size_t            bufSize;
    PDEVICE_EXTENSION devExt = QueueGetExtension(Queue)->DeviceExtension;

    UNREFERENCED_PARAMETER(OutputBufferLength);
    UNREFERENCED_PARAMETER(InputBufferLength);

    KdPrint( ( "IoControlCode:%x\n",IoControlCode));

    if ( !devExt->MediaInDevice && IoControlCode!= IOCTL_FILE_DISK_OPEN_FILE ) 
    {
        Status = STATUS_NO_MEDIA_IN_DEVICE;
        information = 0;
        KdPrint(("FileDisk Dosen`t Opened Yet!\n"));
        _asm int 3
        [COLOR="Red"]WdfRequestCompleteWithInformation(Request, Status, information);
    [/COLOR]}
_asm int 3
    switch (IoControlCode) 
    {
    case IOCTL_FILE_DISK_OPEN_FILE:

case [COLOR="red"]IOCTL_DISK_IS_WRITABLE:
        [/COLOR]{
            KdPrint(("IOCTL_DISK_IS_WRITABLE\n"));
            information=0;
            Status = STATUS_SUCCESS;
        }
    break;
default:
        {
            KdPrint(("IOCTL Code:%x\n",IoControlCode));
            information=0;
            Status = STATUS_INVALID_DEVICE_REQUEST;
            break;
        }
    }

    WdfRequestCompleteWithInformation(Request, Status, information);

kd> !analyze -v
*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

FAT_FILE_SYSTEM (23)
    If you see FatExceptionFilter on the stack then the 2nd and 3rd
    parameters are the exception record and context record. Do a .cxr
    on the 3rd parameter and then kb to obtain a more informative stack
    trace.
Arguments:
Arg1: 000e0100
Arg2: ee0ea538
Arg3: ee0ea234
Arg4: edfb0931

Debugging Details:

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