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Appendix C
Utilities
Specifying SCSI Parameters
183
In the preceding example, the SCSI interface information is shown highlighted bold. You can tell
the information is for the SCSI interface because the path on the first line—Acpi(HWP0002,100)—
is the path from the information displayed by the info io command. The next two lines are for the
SCSI interface two channels, one line for each channel (they contain the SCSI interface description
[LSI Logic Ultra320 SCSI Controller]). Note the value shown for Ctrl—17 and 18—at the
beginning of each of those lines; this is the controller’s handle for each channel. You need to
know it for the next step.
NOTE The controller’s handle values change on every boot.
Step 3. Still at the EFI shell prompt, enter the following command to obtain the EFI driver’s handle for the
SCSI interface:
drvcfg
A list of all EFI-capable configurable components in the server displays. The output may look like
this:
Shell> drvcfg
Configurable Components
Drv[3D] Ctrl[15] Lang[eng]
Drv[3F] Ctrl[19] Lang[eng]
Drv[45] Ctrl[17] Lang[eng]
Drv[45] Ctrl[18] Lang[eng]
This listing shows which driver controls which device (controller). In the above example, the SCSI
interface information is shown highlighted bold. You can tell the information is for this SCSI
interface because the values shown for Ctrl—17 and 18—are the controller’s handles for the SCSI
interface two channels (from the information displayed by the devtree command).
NOTE The EFI driver’s handle values change on every boot.
TIP From this command (drvcfg), we recommend you record these two pieces of
information for each channel of each SCSI interface for parameters to be changed:
• Drv (the EFI driver’s handle)
• Ctrl (the controller’s handle)
Step 4. Using the information (the driver’s handle [Drv] and the controller’s handle [Ctrl]) from the
drvcfg command, start the EFI SCSI Setup Utility for one channel of this SCSI interface. Still at
the EFI shell prompt, enter the following command:
drvcfg -s
drvr_handle cntrl_handle
where:
•
drvr_handle
is the handle of the driver that controls the channel whose SCSI ID you want to
display or change
•
cntrl_handle
is the handle of the controller for the channel whose SCSI ID you want to
display or change