Power-on Initialization Sequence

Familiarize yourself with the system power-on initialization messages. You can then identify problems more accurately because these messages show you the types of functions the system performs at various stages of system startup. They also show the transfer of control from POST to OpenBoot to the Booter to the kernel.

The example that follows shows the OpenBoot initialization sequence in a Sun Ultra^TM 1 system. The messages before the banner appear on TTYA only if the diag-switch? parameter is true.

The actual OpenBoot initialization sequence is system dependent. The messages on your system may be different.

Example C-1 OpenBoot Initialization Sequence

...ttya initialized															(
At this point, POST has finished execution and has transferred
control to OpenBoot)
Probing Memory Bank #0 16 + 16 : 32 Megabytes															(
Probe memory)
Probing Memory Bank #1 0 + 0 : 0 Megabytes
Probing Memory Bank #2 0 + 0 : 0 Megabytes
Probing Memory Bank #3 0 + 0 : 0 Megabytes
															(If use-nvramrc?
 is true, the
firmware executes NVRAMRC commands. The firmware
then checks for Stop-x
 commands, and probes the devices. The
Keyboard LEDs are then flashed.) 
Probing UPA Slot at le,0 Nothing there															(Probe
devices) 
Probing /sbus@lf,0 at 0,0 cgsix
Probing /sbus@lf,0 at 1,0 Nothing there
Probing /sbus@lf,0 at 2,0 Nothing there
Sun Ultra 1 UPA/SBus (UltraSPARC 167 MHz), Keyboard Present	
														(Display the banner) 
OpenBoot 3.0, 32 MB memory installed, Serial #7570016
Ethernet address 8:0:20:73:82:60, Host ID: 80738260.
ok boot disk3
Boot device: /sbus/espdma@e,8400000/esp@e,8800000/sd@3,0	
														(The firmware is TFTP-ing the
boot program)
sd@3,0 File and args: 														(Control
is transferred to the booter after this message
is displayed) 
FCode UFS Reader 1.8 01 Feb 1995 17:07:00,IEEE 1275 Client
Interface.															(Booter starts
executing) 
Loading: /platform/sun4u/ufsboot
cpu0: SUNW,UltraSPARC (upaid 0 impl 0x0 ver 0x0 clock 143
MHz)
SunOS Release 5.5 Version quick_gate_build:04/13/95 (UNIX(R)
System V Release 4.0)															
														(Control is passed to the kernel
after this message is displayed) 
Copyright (c) 1983-1995, Sun Microsystems, Inc.	
														(The kernel starts to execute)
DEBUG enabled										(More kernel
messasges)