Sun Microsystems Ultra 450 Manual page 15

pci0-probe-list. This variable controls both the probing order and exclusion of
devices on PCI bus 0. The values in the pci0-probe-list are defined in the
following table.
Values in the pci0-probe-list
TABLE 2–2
PCI Device
Number Function
UPA-PCI bus bridge (not probed)
0
EBus/Ethernet interface (always probed, never included in probe list)
1
On-board SCSI controller for removable media devices and external SCSI
2
port
On-board SCSI controller for 4-slot UltraSCSI backplane
3
Back panel PCI slot 10
4
Note -
The values in this list are based on the PCI device number and do not refer to
the back panel slot numbering scheme of 1–10.
In the following example, the pci0-probe-list variable is used to define a
probing order of 3-4, while excluding from the probe list the on-board SCSI
controller for removable media devices and the external SCSI port.
ok setenv pci0-probe-list 3,4
The probing order of the other five PCI buses (PCI slots 1 through 9) is not subject to
user control. These slots are always probed in the following order: 5-3-2-1-4-9-8-7-6.
However, a list of PCI slots can be excluded from probing via the NVRAM variable
pci-slot-skip-list. In the following example, the pci-slot-skip-list
variable is used to exclude back panel slots 3 and 8 from the PCI probe list.
ok setenv pci-slot-skip-list 3,8
Note - The values in the pci-slot-skip-list correspond to the back panel
numbering scheme of 1–10. If slot 10 is in this list, then it will be excluded from
probing even if pci0-probe-list includes device number 4 (back panel slot 10).
System Configuration Parameters
7