ultra 60 hangs during the POST
Hi sun gurus,
I have an Ultra 60 that started to act up. The problem started when I tried to mount a solaris 9 cd. It did not mount the cd. Then I rebooted and still had problems mounting the CD. Then I halted the system and at the OK prompt did the probe-scsi-all. It showed all the devices except at the end I got "Fast Instruction access MMU miss". Then I changed the values of DIAG-SWITCH to TRUE and DIAG-LEVEL to MAX. Upon rebooting the machine it hangs and I don't even get the banner. I have removed the memory modules, disks and yet no banner at all. The KEYBOARD is not responding either. Could it be the power supply (the power light comes on when I reset the machine) or may be the mother board?
need your help?
thanks
[756 byte] By [
afadaghi] at [2007-11-26 7:05:38]
# 1
If those were the only two OBP changes, then you've set the system into never-never land.
Connect the keyboard/mouse back to the system and turn it on again.
This time you will need to hold the STOP and the N keys
to reset the OBP back to the default (normal) settings.
Although it is a going to be difficult to hold them, you will need to continue
to hold those keys down until you see something on the screen, again.
Only then can you release the STOP-N key sequence.
It may feel like it's taking forever, but may be as much as two minutes.
Then press STOP-A to halt the boot process and get to the OK prompt.
When you had earlier changed those two OBP settings,
you toggled the system into diagnostic mode, and at a maximum depth of diagnosis.
Sun(SPARC) systems default to using the network as their diagnostic device.
The default input and output devices are no longer keyboard and screen,
but are TTYa at that time.
An Ultra-60's max diagnostic POST could take minutes to complete.
During all that time, console output is out your TTYa and you won't
get anything to the monitor until the system finally completes those processes.
Is your network pre-configured to capture such output?Most are not.
Had you prepared the system with a connection to TTYa ?I'm guessing not.
For the near future, do not bother with any diag-POST.
Instead, do ...
OK set-defaults
OK setenv auto-boot? false
OK reset-all
The computer will reset and automatically stop at the OBP prompt with clear data buffers.
You can then probe your SCSI bus without seing the MMU errors.
When you've completed your investigations, you can set the auto-boot variable back to 'true',
else the system will always stop at OBP, and you'd have to type 'boot' each time you want to launch your OS.
My prediction for the disk mounting issue?
... just some software glitch with either vold or your command syntax.
