Sun External I/O Expansion Unit
 

PLA-Support>Sun Systems>SPARC>Enterprise>SN-SPARC: Mx000
 
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Applies to:

Goal

The intent of this document is to provide the reader with an overview of how the Sun SPARC External I/O Expansion Unit device paths are arranged.

Solution

The Sun SPARC External I/O Expansion Unit provides additional I/O HBA slots to the server to which the unit is attached.


There are two types of expansion  boats  that can be used in the Sun SPARC  External I/O Expansion Unit:

Expansion of 1 Server PCIe slot to 6 PCIe slots via the PCIe boat

Expansion of 1 Server PCIe slot to 6 PCI/PCI-X slots via the PCI-X boat

In order to understand the Sun SPARC  External I/O Expansion Unit Device Paths, it is helpful to have a high level understanding of the unit's architecture, which is graphically represented as follows:

PCIe boat:

Server's PCIe slot device path, plus:

         |--/pci@0

                   |--pci@1/pci@0

                             |--pci@0  (Slot 1)

                             |--pci@1  (Slot 2)

                             |--pci@9  (Slot 3)

                   |--pci@9/pci@0

                             |--pci@0  (Slot 4)

                             |--pci@1  (Slot 5)

                             |--pci@9  (Slot 6)

PCI/PCI-X boat:

Server's PCIe slot device path, plus:

        |--/pci@0

                   |--pci@1

                             |--pci@0     (Slot 1)

                             |--pci@0,1  (Slot 2)

                   |--pci@9

                             |--pci@0     (Slot 3)

                             |--pci@0,1  (Slot 4)

                   |--pci@8

                             |--pci@0     (Slot 5)

                             |--pci@0,1  (Slot 6)

The same information as represented in the following tables:

For more information on  Sun SPARC  Enterprise M4000/M5000 server Device Paths, see Document: 1002807.1 Sun SPARC Enterprise M4000 and M5000 Server Device Paths. 

For more information on  Sun SPARC  Enterprise M8000/M9000 Device Paths, see Document: 1004116.1 Sun SPARC Enterprise M8000 and M9000 Device Paths.  

Actual device paths may be seen using some of the following methods:

OBP:   show-devs  command

Solaris:  /etc/path_to_inst  file

Solaris:   prtpicl  command

Solaris:   prtdiag -v  command

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