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Keith Kris
Guest
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 Posted: Wed Jan 14, 2004 6:49 pm Post subject: System Hang before OBP on Ultra 30 |
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I'm trying to bring an old U30 back to life, and I have a suspiscion
as to the problem, but I'd love for someone to tell me something else
would be an easier fix. Here's the problem:
- Boot system, system recognizes the one quad filled with 32MB dimms,
tests memory, then hangs with no further messages, stop-a does nothing
at this point.
- If I hit stop-a before the memory test completes, I can get into
OBP.
- test-all and probe-scsi-all initially gave "bus error" when they
attempted to access the integrated scsi bus. I reseated the memory,
vaccuumed the dust from inside the case, and that problem seems to
have subsided.
- test-all now reports no failures (other than the fact that no floppy
is installed, and the ethernet port isn't plugged in.)
- The system continues to hang after memory test
- I attempted to remove one bank of memory, with the same results
If anyone has seen anything like this, I'd love to hear solutions. My
gut feeling is that the system board is bad, but finding a replacement
will be hard. I'm going to try tipping in to the serial port tonight
to see if I get any more detailed error messages on boot. I tried a
deja search, but didn't find anything that seemed to be relevant to
this problem.
Thanks for any help anyone can provide. |
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Florian Stiassny
Guest
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| Posted: Thu Jan 15, 2004 9:47 am Post subject: Re: System Hang before OBP on Ultra 30 |
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In article 5dfe6ee6@posting.google.com, dejanews@keithkris.com (Keith Kris) writes:
| Quote: | I'm trying to bring an old U30 back to life, and I have a suspiscion
as to the problem, but I'd love for someone to tell me something else
would be an easier fix. Here's the problem:
- Boot system, system recognizes the one quad filled with 32MB dimms,
tests memory, then hangs with no further messages, stop-a does nothing
at this point.
- If I hit stop-a before the memory test completes, I can get into
OBP.
- test-all and probe-scsi-all initially gave "bus error" when they
attempted to access the integrated scsi bus. I reseated the memory,
vaccuumed the dust from inside the case, and that problem seems to
have subsided.
- test-all now reports no failures (other than the fact that no floppy
is installed, and the ethernet port isn't plugged in.)
- The system continues to hang after memory test
- I attempted to remove one bank of memory, with the same results
If anyone has seen anything like this, I'd love to hear solutions. My
gut feeling is that the system board is bad, but finding a replacement
will be hard. I'm going to try tipping in to the serial port tonight
to see if I get any more detailed error messages on boot. I tried a
deja search, but didn't find anything that seemed to be relevant to
this problem.
Thanks for any help anyone can provide.
|
may be booting with
setenv diag-switch? true
setenv diag-level max
will show where it hangs
---
\|/
o o
___________________oOO_(_)_OOo______________________________________
Florian Stiassny Florian.Stiassny@motorola.com |
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Keith Kris
Guest
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| Posted: Thu Jan 15, 2004 2:46 pm Post subject: Re: System Hang before OBP on Ultra 30 |
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Great idea. I tried that the first time though, and I saw no failures
before the hang. Now I'm wondering if it's the NVRAM, as I tried
high-half booting the system, and it didn't even begin to boot.
flo@xvnews.unconfigured.domain (Florian Stiassny) wrote in message news:<bu5i3v$t71$2@newshost.mot.com>...
| Quote: | In article 5dfe6ee6@posting.google.com, dejanews@keithkris.com (Keith Kris) writes:
I'm trying to bring an old U30 back to life, and I have a suspiscion
as to the problem, but I'd love for someone to tell me something else
would be an easier fix. Here's the problem:
- Boot system, system recognizes the one quad filled with 32MB dimms,
tests memory, then hangs with no further messages, stop-a does nothing
at this point.
- If I hit stop-a before the memory test completes, I can get into
OBP.
- test-all and probe-scsi-all initially gave "bus error" when they
attempted to access the integrated scsi bus. I reseated the memory,
vaccuumed the dust from inside the case, and that problem seems to
have subsided.
- test-all now reports no failures (other than the fact that no floppy
is installed, and the ethernet port isn't plugged in.)
- The system continues to hang after memory test
- I attempted to remove one bank of memory, with the same results
If anyone has seen anything like this, I'd love to hear solutions. My
gut feeling is that the system board is bad, but finding a replacement
will be hard. I'm going to try tipping in to the serial port tonight
to see if I get any more detailed error messages on boot. I tried a
deja search, but didn't find anything that seemed to be relevant to
this problem.
Thanks for any help anyone can provide.
may be booting with
setenv diag-switch? true
setenv diag-level max
will show where it hangs
---
\|/
o o
___________________oOO_(_)_OOo______________________________________
Florian Stiassny Florian.Stiassny@motorola.com |
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Casper H.S. Dik
Guest
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| Posted: Fri Jan 16, 2004 12:46 pm Post subject: Re: System Hang before OBP on Ultra 30 |
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dejanews@keithkris.com (Keith Kris) writes:
| Quote: | Great idea. I tried that the first time though, and I saw no failures
before the hang. Now I'm wondering if it's the NVRAM, as I tried
high-half booting the system, and it didn't even begin to boot.
|
high-half booting would attempt to boot from POST; that never
works. It's only useful if you encounter a failure during
flashing.
The prom is divided in two parts: one for OBP and one
for POST.
Flashing goes through the following sequence:
Clear high-half (POST)
Flash high-half with OBP
-- start ability to boot from high half
Clear low-half
- can no longer boot with standard setting
Flash low-half with OBP
- can boot again from low-half
Clear high-half
-- end of ability to boot from high half
Flash high-half with POST
Have you tried keepign down L1-N (Stop-N) while
powering the system up?
Casper
--
Expressed in this posting are my opinions. They are in no way related
to opinions held by my employer, Sun Microsystems.
Statements on Sun products included here are not gospel and may
be fiction rather than truth. |
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Keith Kris
Guest
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| Posted: Thu Jan 22, 2004 1:47 am Post subject: Re: System Hang before OBP on Ultra 30 |
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Well I finally found the problem. Thanks for all the suggestions. It
appears someone tried to replace the NVRAM at some point. The chip
was backwards in the carrier (though the carrier was the right way
around.) I flipped it and the system booted normally.
Casper H.S. Dik <Casper.Dik@Sun.COM> wrote in message news:<4007d546$0$331$e4fe514c@news.xs4all.nl>...
| Quote: | dejanews@keithkris.com (Keith Kris) writes:
Great idea. I tried that the first time though, and I saw no failures
before the hang. Now I'm wondering if it's the NVRAM, as I tried
high-half booting the system, and it didn't even begin to boot.
high-half booting would attempt to boot from POST; that never
works. It's only useful if you encounter a failure during
flashing.
The prom is divided in two parts: one for OBP and one
for POST.
Flashing goes through the following sequence:
Clear high-half (POST)
Flash high-half with OBP
-- start ability to boot from high half
Clear low-half
- can no longer boot with standard setting
Flash low-half with OBP
- can boot again from low-half
Clear high-half
-- end of ability to boot from high half
Flash high-half with POST
Have you tried keepign down L1-N (Stop-N) while
powering the system up?
Casper |
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