HP StorageWorks XP Remote Web Console Software - Manual (Page 9)

A, but are faster than parity groups in class C. Parity groups in higher classes (such as class A)
provide faster disk access than parity groups in lower classes (such as class C).
NOTE: In the storage system documentation, the terms class and HDD class mean the same thing.
Figure 3 Classes and Parity Groups That Appear in the XP Auto LUN Window
Next, you should choose a low-usage parity group from the fast parity groups. You can find
low-usage volumes in the XP Auto LUN window (see
Figure 4 (page 9) ).
Figure 4 Parity Group Usage Displayed in the XP Auto LUN Window
Overview of Volume Migration 9