Common Path, Single Path PD

After you read the relevant information in this chapter, return to the Common Path PD map.

In Figure 1, the HBA, HBA-to-concentrator (switch) cable, and the port that this cable uses are on the common path to all storage. The other cables and ports to the controllers are on their own paths so that a failure on them does not affect the others. This configuration is referred to as a single path configuration.

Note: A concentrator refers to a switch, hub, or other such device.

Figure 1. Common path configuration

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