C-1
A P P E N D I X
C
PCI Cards and Device Mapping
This appendix shows examples of device maps (device paths) for PCI cards in an
External I/O Expansion Unit attached to a host system. Use this information to
identify and locate PCI cards in the External I/O Expansion Unit I/O boats.
Topics in this appendix include:
■
Section C.1, “Device Mapping” on page C-1
■
Section C.2, “Device Map Examples” on page C-3
■
Section C.3, “Software Commands for the External I/O Expansion Unit” on
page C-6
C.1
Device Mapping
When the host server is booted, the OpenBoot PROM creates a map of devices
internal and external to the host server. When mapping the external devices, the
OpenBoot PROM starts from the host’s I/O Unit (IOU) slots. For the External I/O
Expansion Unit, the device map includes circuitry in the I/O boats, the PCI cards in
the I/O boats, and the external devices that are connected to the PCI cards.
Note –
The External I/O Expansion Unit’s link cards and link cable do not appear in
the device map. When you install a link card in the host server, the OpenBoot PROM
will not detect that card. After you connect the link cable(s) between the link card in
the host server and the link card in an I/O boat, the OpenBoot PROM can detect
circuitry and any PCI cards in the I/O Boat.
The host server’s IOU slots are identified by various device path names such as
/pci@
x
0,600000
,
/pci@
x
1,700000
,
/pci@
x
2,600000
, and so forth. These names
vary according to the location of the I/O unit (IOU) in the host, and by the slot
location in the I/O unit. For the IOU slot names, see
and
Summary of Contents for SPARC Enterprise M4000
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