Boot Device Variables - Sun Microsystems Netra CT 820 Administration Manual

Boot Device Variables

By default, the OpenBoot PROM NVRAM boot-device configuration variable is
set to disk net, disk being an alias for the path to the local disk, and net being an
alias for the path of the primary network. You can set the boot device for node
boards through the distributed management card CLI setfru command. Refer to
"Configuring a Chassis Slot for a Board" on page 18
setfru command to specify a boot device for a board.
For example, you might want to change the node board in slot 3 to boot first from its
PMC disk. To do this, check the current OpenBoot PROM boot-device variable:
ok printenv boot-device
boot-device =
ok
On the distributed management card, check and change the boot_devices setting:
hostname cli>
showfru: Boot_Devices:
hostname cli>
hostname cli>
showfru: Boot_Devices: pmc0/disk net
hostname cli>
After you power cycle the system, check the OpenBoot PROM boot-device
variable:
ok printenv boot-device
boot-device =
ok
When a node board is hot swapped, power cycled, rebooted, or reset, the OpenBoot
PROM firmware checks with the distributed management card for a boot device for
that slot. The distributed management card sends the value from the Boot_Devices
field in FRU ID to the OpenBoot PROM firmware; the value is either the boot device
list for that slot you set using the setfru command or a null string if you did not
set a boot device list for that slot. The value overwrites the NVRAM boot-device
value. The board will boot from the value in the boot-device variable if its diag-
switch? variable is set to false (the default); the board will boot from the value in
the diag-device variable (the default is net) if its diag-switch? variable is set to
true.
52 Netra CT 820 Server System Administration Guide • March 2004
disk net
showfru slot 3 boot_devices
setfru slot 3 boot_devices pmc0/disk net
showfru slot 3 boot_devices
pmc0/disk net
for information on using the