Managing HP Serviceguard for Linux, Sixth Edition, August 2006

Understanding Serviceguard Software Components
Volume Managers for Data Storage
Chapter 376
Examples of Storage on Smart Arrays
Figure 3-21 shows an illustration of storage configured on a Smart
MSA500 storage. Physical disks are configured by an array utility
program into logical units or LUNs which are then seen by the operating
system.
Figure 3-21 Physical Disks Combined into LUNs
NOTE LUN definition is normally done using utility programs provided by the
disk array manufacturer. Since arrays vary considerably, you should
refer to the documentation that accompanies your storage unit.