Figure 31 Multiple Devices Configured in Volume Groups

Examples of Storage on Disk Arrays

Figure 32 shows an illustration of storage configured on a disk array. Physical disks are configured by an array utility program into logical units or LUNs which are then seen by the operating system.

Figure 32 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.

Figure 33 shows LUNs configured with multiple paths (links) to provide redundant pathways to the data.

82 Understanding Serviceguard Software Components

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HP Serviceguard manual Examples of Storage on Disk Arrays, Multiple Devices Configured in Volume Groups