HP NetStorage 6000 - Manual (Page 11)

Overview
HP NetStorage 6000 Hardware
1-4
Logical Drives
Physical drives are grouped together to form one or more logical drives,
which are also known as RAID sets. Physical drives are also used
individually as hot spares. Logical drives and hot spares are configured at
the factory. The illustration in figure 1.2 shows a typical configuration.
Figure 1.2 Logical Drives
Note The HP NetStorage 6000 supports only RAID level 5 for the creation of
logical drives. Because RAID level 5 requires a minimum of 3 physical
drives for a RAID set, the HP NetStorage 6000 requires at least 3 drives to
be grouped together to create a logical drive, though you can create a
logical drive that uses as many as eight physical drives.