Chapter 4
Utilities
Specifying SCSI Parameters
47
In the example above, a single SCSI interface is shown in the listing. The information for both
channels of the SCSI interface is shown in
bold
, for highlighting purposes.
For each channel of the SCSI board, you need to note certain information. As an example, look at
the information for the SCSI interface (the first two bold lines). For each channel of
this
SCSI
interface, note the following information:
•
Bus #
—identifies the bus the device is on; for the SCSI interface, this is the same for both
channels. In this example, the bus number is
20
.
•
Dev #
—the ID the device is assigned on the bus; for the SCSI interface, this is the same for
both channels. In this example, the SCSI interface is device
01
.
•
Fnc #
—identifies the channel of the device (
00
for channel A,
01
for channel B, and so on). In
this example, because the SCSI interface has two channels, one channel is
00
and the other is
01
.
•
Vendor ID
—shows the device’s vendor ID; for the SCSI interface, this is the same for both
channels. For all the SCSI interface the ID is
0x1000
.
•
Device ID
—shows the device ID; for the SCSI interface, this is the same for both channels. For
the SCSI interface the ID is
0x0030
.
•
Slot #
—identifies the physical card slot in the system where the SCSI interface is installed;
for the SCSI interface, this is the same for both channels. In this example, the SCSI interface is
on the system board therefore the in slot number is
xx
.
•
Path
—identifies the device’s path; for the SCSI interface, this is the same for both channels. In
this example, the SCSI interface path is
Acpi(HWP0002,200)/Pci(1|0)
for channel A and
Acpi(HWP0002,200)/Pci(1|1)
for channel B.
Using the SCSI interface information from the example above, the pieces of information that,
combined, tell you this is a SCSI interface are the following (shown in
bold
, for highlighting
purposes):
00
20
01
00
0x1000
0x0030
xx
Acpi(HWP0002,200)/Pci(1|0)
00
20
01
01
0x1000
0x0030
xx
Acpi(HWP0002,200)/Pci(1|1)
Looking at all of the above information together, the vendor (
0x1000
) and device (
0x0030
) are the
IDs for a SCSI interface. Of the devices with those IDs, this device has two channels (Fnc # of
00
immediately followed by Fnc # of
01
). Also, this SCSI interface has a non-numeric (XX) slot #
indicating that it is on the system board.
Step 2.
Still at the EFI shell prompt, type this command to obtain the controller’s handle for the SCSI
interface:
devtree
A tree of all EFI-capable devices installed in the system is displayed. The output could look like
this:
Shell> devtree
Device Tree
Ctrl[04]
Ctrl[0A] Acpi(HWP0002,0)
