The Mainframe Analytics Reporter (MAR) product provides information about Hitachi Data Systems disk arrays. The data is provided in SMF type 191 records. With the SDF21N5 PTF, this data can be flattened and forwarded to a target destination such as Splunk or Kafka. The field names for data are as per the Hitachi documentation, for more information, see Mainframe Analytics Recorder User Guide - Hitachi Vantara Knowledge.