text: **10.1.3 Monitoring Easy Tier activity**
  
  When Easy Tier is active, it constantly monitors and records I/O activity, collecting extent heat 
  data. Heat data files are produced approximately once a day and summarize the activity per 
  volume since the last heat data file was produced. 
  
  The IBM Storage Tier Advisor Tool (STAT) is a Windows console application that can analyze 
  heat data files that are produced by Easy Tier and produce a graphical display of the amount 
  of “hot” data per volume and predictions of how more Solid-State Drive (T0) capacity, 
  Enterprise Drive (T1), and Nearline Drive (T2) might benefit performance for the system and 
  by storage pool. 