HP Surestore Disk Array FC60 HP SureStore E Disk Array FC60 - (English) Advanc - Page 208

Interpreting Hardware Paths Each component on the disk array is identified by a unique hardware path. The interpretation of the hardware path differs depending on the type of addressing used to access the component. Two types of addressing are used with the Disk Array FC60: • Peripheral Device Addressing (PDA) - used to address the disk array controller modules. • Volume Set Addressing (VSA) - used to address the disk array LUNs Because each controller module is identified by a unique loop address, the disk array is identified by two hardware paths. Peripheral Device Addressing Peripheral device addressing (PDA) is used to identify the disk array controller modules. A disk array controller module can be identified in the ioscan output as an entry with a driver type of sctl and a description of HP A5277A. Figure 80 illustrates the interpretation of the fields in the hardware path when using PDA. Peripheral Device Addressing (PDA) Hardware Path 8/12.8.0.255.1.2.0 Not Used (LUN - Logical Unit Number of disk) Target (Lower 4 bits of the loop ID) Bus (Upper 4 bits of the loop ID) Port (255 = the target connected directly to the FC) Area (0 = point-to-point or private loop) Protocol Type (8 = mass storage) Adapter Bus Converter Figure 80 Peripheral Device Addressing Hardware Path 208 Verifying Disk Array Connection