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 start-up. They also show the transfer of control from POST to the OpenBoot firmware to the Booter to the kernel.

The example that follows shows the OpenBoot initialization sequence in a SPARCstation 10 system. The messages before the banner appear on TTYA only if the diag-switch? parameter is true.

The displayed kernel messages may vary depending on the version of the operating system you are using

ttya initialized												(At this point, POST has finished execution 
		 										 and transferred control to the OpenBoot firmware)

Cpu #0 TI,TMS390Z50												(Probe CPU module)
Cpu #1 Nothing there
Cpu #2 Nothing there
Cpu #3 Nothing there	
Probing Memory Bank #0 16 Megabytes of DRAM												(Probe memory)
Probing Memory Bank #1 Nothing there
Probing Memory Bank #2 Nothing there
Probing Memory Bank #3 Nothing there
Probing Memory Bank #4 Nothing there
Probing Memory Bank #5 Nothing there
Probing Memory Bank #6 Nothing there
Probing Memory Bank #7 Nothing there	

Before probing the devices, the firmware executes NVRAMRC commands - if use-nvramrc? is true - and checks for Stop-x commands Keyboard LEDs flash

Probing /iommu@f,e0000000/sbus@f,e0001000 at f,0 												(Probe devices) 
	espdma esp sd st ledma le SUNW,bpp SUNW,DBRIa
Probing /iommu@f,e0000000/sbus@f,e0001000 at 0,0 
	Nothing there
Probing /iommu@f,e0000000/sbus@f,e0001000 at 1,0 
	Nothing there
Probing /iommu@f,e0000000/sbus@f,e0001000 at 2,0 
	Nothing there
Probing /iommu@f,e0000000/sbus@f,e0001000 at 3,0 
	Nothing there


SPARCstation 10 (1 X 390Z50), Keyboard Present												(Display banner) 
ROM Rev. 2.10, 16 MB memory installed, Serial #4194577.
Ethernet address 8:0:20:10:61:b5, Host ID: 72400111.

Boot device: /iommu/sbus/espdma@f,400000/esp@f,800000/												(The firmware is TFTP-ing 
																						in the boot program)
	sd@3,0 File and args: 											(Control is transferred to Booter after
												 this message is displayed) 
root on /iommu@f,e0000000/sbus@f,e0001000/espdma@												(Booter starts executing) 
	f,400000/esp@f,800000/sd@3,0:a fstype 4.2
	
Boot: vmunix
Size: 1425408+436752+176288 bytes												(Control is passed to the Kernel after 
														 this message is displayed) 
Viking/NE: PAC ENABLED												(Kernel starts to execute)	... 											(More kernel messages)