The !rcdrkd.rcdrlogsave extension saves the recorder buffers of a driver.
!rcdrkd.rcdrlogsave DriverName [CaptureFilename ]
The name of the driver, not including the .sys extension.
The name of the file (not including the .etl extension) in which to save the recorder buffers. If CaptureFileName is not specified, the recorder buffers are saved in DriverName.etl.