Chapter 4
Utilities
Specifying SCSI Parameters
49
Ctrl[44] VenHw(904EFCF0-F0A8-11D4-B4CA-303031303833)
Ctrl[46] VenHw(D65A6B8C-71E5-4DF0-A909-F0D2992B5AA9)
In the above 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 Ultra160 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 will change on every boot.
Step 3. Still at the EFI shell prompt, type this command to obtain the EFI driver’s handle for the SCSI
interface:
drvcfg
A list of all EFI-capable configurable components in the system is displayed. 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 will 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)
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