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Fibre Channel for Mass Storage by Ralph H. Thornburgh

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4.1. The Addressing Limitations of HP-UX

As discussed in the previous chapter, Fibre Channel allows a potentially very large number of available addresses. However, this large number of available addresses does not fit seamlessly into the current addressing model in the HP-UX operating system. To handle the number of possible addresses, the Fibre Channel Protocol (FCP) subsystem on HP-UX uses three methods of addressing:

  • Peripheral Device addressing

  • Logical Unit addressing

  • Volume Set addressing

But first, there are two major limitations and work-arounds that need to be explained.

4.1.1. Target Address Space Limitations

Figure 4-1. Target Address Space Limitations

Parallel SCSI has the capacity to handle 16 IDs (targets or devices) per bus, ...

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