94 SPARC Enterprise Mx000 Servers Administration Guide • November 2007
I/O Device Mapping
I/O device paths are dictated by which LSB the I/O unit is assigned to.
The M4000 and M5000 servers have only one I/O controller on the I/O unit (IOU).
For an XSB in Uni-XSB mode, all I/O is on XSB#xx-0. For an XSB in Quad-XSB mode,
internal resources, the PCI-X slot, and two PCIe slots are on XSB#xx-0, and two PCIe
slots are on XSB#xx-1.
The M8000 and M9000 servers have two I/O controllers; therefore, each XSB can
have two PCIe slots assigned to it.
TABLE A-2 shows the LSB numbers and the corresponding device path values that are
used in I/O device mapping on the server.
07 3 248, 249, 250, 251 2150 4.0 6 129
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TABLE A-2 LSB Numbers and Device Path Values
LSB Number Device Path Value
00 No value
01 1
02 2
03 3
04 4
05 5
06 6
07 7
08 8
09 9
10 a
11 b
12 c
