HP 3PAR System Reporter Software - Manual (Page 79)

Figure 29 Versus Time with Compare=System Report Example
If you want to compare the performance of a particular class of objects (for example, systems),
then you can use the Compare control (see
“Compare” (page 82) ) available in some reports if the
Report Type is Versus Time. Figure 29 (page 79) shows an example where systems are being
compared. In this kind of report, for each metric there is a single line per object being compared
so it is not possible to break down components (for example Reads and Writes) of the metric.
Creating Custom Reports 79