Information Technology Reference
In-Depth Information
Table 2.3
OpenBoot Commands for Performing Hardware Testing
Command
Description
pcia-probe-list
Tests PCI (3.x only).
probe-scsi
Tests built-in SCSI for connected devices.
probe-scsi-all
Tests all SCSI buses.
test-all
Tests a group of install devices.
test floppy
Tests the disk drive.
test /memory
Tests system memory (2.x only).
test net
Tests the on-board Ethernet interface.
watch-clock
Monitors the system clock.
watch-net
Monitors the network connection.
Table 2.4 lists the variations of the OpenBoot boot command that are used
to select different boot devices.
Table 2.4
OpenBoot Commands for Selecting Different Boot Devices
Command
Description
boot cdrom
Boots from the local CD-ROM.
boot disk
Boots from the default hard disk.
boot floppy
Boots from the disk drive.
boot net
Boots from the network.
boot tape
Boots from the SCSI tape drive.
The boot command supports a couple of options that might be useful. The
-a option requests an interactive boot so that information will be prompted
for when needed. In addition, the -s option causes booting to single-user
mode instead of the default system run level. When booting from the hard
disk, you specify the default device by the boot-device NVRAM configura-
tion parameter. From the OpenBoot ok prompt, use the following command
to display the default device:
ok printenv boot-device
boot-device = disk
ok
The default device can be changed as required. For example, to change the
default boot device to a device with the alias of disk2 , use the following
command. Then use reset to reboot:
ok setenv boot-device disk2
ok reset
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