Re: questions about Fatal Trap 12
Steve Bertrand wrote: > Glen Barber wrote: >> On Tue, Apr 14, 2009 at 5:23 PM, Ray wrote: >>> I Just had the power supply die on this machine. Could a failing power >>> supply cause this type of issues? >> >> Absolutely. > > Seconded. Power supply issues have caused me this kind of grief more > times than memory has over the years. > Yes, "me too". With the advent of the digital age there is less and less cognizance of analog electronics these days. Simply checking the output voltages with a Radio Shack VOM will make things seem to be OK, as in the measurements seem to be within the range you'd expect, but this is not an entirely accurate assessment. It can be the case where a power supply has aged to the point that it can support only some fraction of the load it was rated at when new. As long as the load stays below this derated value the box seems all right, but plug in another drive or some other hardware that pushes it over the edge and you get another story. What you will get is non-pure DC with huge amounts of unfiltered ripple. The VOM will not show this. You would have to be using an oscilloscope to see it. But even an old power supply that is not loaded down to the point of total failure can begin to show out of spec ripple measurement as load increases. This ripple can be the source of seemingly intermittent hardware problems such as hangs, mysterious automagic rebooting, lock ups, etc, that seem to have no rhyme or reason to them. Many times in the distant past I replaced one by one each subsystem with known good ones to the point where the power supply was the last thing I tried. These days if it is an older box with a lot of hours of MTBF on it I do it first, using a known good. Probably 70%+ of the time it has turned out to save lots of time. Rather than try every thing else first I have learned to eliminate the power supply first, rather than the other way around. But I also have a 100MHz dual trace 'scope too. -Mike ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: questions about Fatal Trap 12
Glen Barber wrote: > On Tue, Apr 14, 2009 at 5:23 PM, Ray wrote: >> I Just had the power supply die on this machine. Could a failing power >> supply >> cause this type of issues? > > Absolutely. Seconded. Power supply issues have caused me this kind of grief more times than memory has over the years. Steve ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: questions about Fatal Trap 12
On Tue, Apr 14, 2009 at 5:23 PM, Ray wrote: > I Just had the power supply die on this machine. Could a failing power supply > cause this type of issues? Absolutely. -- Glen Barber ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: questions about Fatal Trap 12
On Saturday 11 April 2009 19:34:29 Paul Hamilton wrote: > -Original Message- > From: owner-freebsd-questi...@freebsd.org > [mailto:owner-freebsd-questi...@freebsd.org] On Behalf Of Ray > Sent: Saturday, 4 April 2009 01:45 > To: freebsd general questions > Subject: questions about Fatal Trap 12 > > Hello, > I have received a kernel Trap 12 error several times now and am trying to > figure it out. > the error occurred today, and the previous time was about two weeks ago. > last time I had to run fsck manually if that proves anything. > > > Any help or suggestions would be greatly appreciated. > Ray > ___ > > > > Hi Ray, > > I have had a few of the Trap 12 errors over the last 10 years of using > FreeBSD. From memory, mine where due to faulty motherboard/CPU. I just > moved the hard drive to another PC, and all was ok. > > The last time I received the error, was when I tried recompiling world. I > put it down to CPU heat, as it was running a LOT harder than normal day to > day use. This was on a server that had been in place for two years running > with out problem! > > Cheers, > > PaulH > I Just had the power supply die on this machine. Could a failing power supply cause this type of issues? Ray > > > ___ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "freebsd-questions-unsubscr...@freebsd.org" ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: questions about Fatal Trap 12
On Mon, 13 Apr 2009 18:31:31 +0300, Ray wrote: Thanks Paul and Chris, So what It comes down to is that this error is most likely a hardware problem, and I'll just have to bring the machine down for hardware replacement and/or testing? Usually yes. Back in the days when I had that sort of problems, it was memory related. So I changed the memory (memtest yelled in errors) and all was ok afterwards ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: questions about Fatal Trap 12
Thanks Paul and Chris, So what It comes down to is that this error is most likely a hardware problem, and I'll just have to bring the machine down for hardware replacement and/or testing? Thanks, Ray ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
RE: questions about Fatal Trap 12
-Original Message- From: owner-freebsd-questi...@freebsd.org [mailto:owner-freebsd-questi...@freebsd.org] On Behalf Of Ray Sent: Saturday, 4 April 2009 01:45 To: freebsd general questions Subject: questions about Fatal Trap 12 Hello, I have received a kernel Trap 12 error several times now and am trying to figure it out. the error occurred today, and the previous time was about two weeks ago. last time I had to run fsck manually if that proves anything. uname -a gives the following: FreeBSD wserver..com 7.0-RELEASE-p3 FreeBSD 7.0-RELEASE-p3 #0: Wed Sep 17 13:30:46 MDT 2008 r...@wserver.*.com:/usr/obj/usr/src/sys/MOD amd64 Google returns results mostly for versions 4.x and 5.x, but it suggest 2 main things: test ram, and kernel panic troubleshooting. (http://www.freebsd.org/doc/en/books/faq/advanced.html#KERNEL-PANIC- TROUBLESHOOTING) Is there a way to test the ram without removing it from the machine and leave the machine functioning. I've used memtest 86 before, but obviously the machine has to be offline for this test. However, I'm a little unsure of the instructions in the handbook on troubleshooting. namely, it talks about using the nm command, put I can't figure out the data file to give it as an argument, and second I'm unsure about using a debugging Kernel on a production server. I have heard that It will significantly slow down a machine. Any help or suggestions would be greatly appreciated. Ray ___ Hi Ray, I have had a few of the Trap 12 errors over the last 10 years of using FreeBSD. From memory, mine where due to faulty motherboard/CPU. I just moved the hard drive to another PC, and all was ok. The last time I received the error, was when I tried recompiling world. I put it down to CPU heat, as it was running a LOT harder than normal day to day use. This was on a server that had been in place for two years running with out problem! Cheers, PaulH ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: questions about Fatal Trap 12
2009/4/9 Ray : > On Friday 03 April 2009 11:44:31 Ray wrote: >> Hello, >> I have received a kernel Trap 12 error several times now and am trying to >> figure it out. >> the error occurred today, and the previous time was about two weeks ago. >> last time I had to run fsck manually if that proves anything. >> >> >> uname -a gives the following: >> >> FreeBSD wserver..com 7.0-RELEASE-p3 FreeBSD 7.0-RELEASE-p3 #0: Wed >> Sep 17 13:30:46 MDT 2008 >> r...@wserver.*.com:/usr/obj/usr/src/sys/MOD amd64 >> >> >> Google returns results mostly for versions 4.x and 5.x, but it suggest 2 >> main things: >> test ram, and kernel panic troubleshooting. >> (http://www.freebsd.org/doc/en/books/faq/advanced.html#KERNEL-PANIC- >> TROUBLESHOOTING) >> >> Is there a way to test the ram without removing it from the machine and >> leave the machine functioning. I've used memtest 86 before, but obviously >> the machine has to be offline for this test. >> >> However, I'm a little unsure of the instructions in the handbook on >> troubleshooting. namely, it talks about using the nm command, but I can't >> figure out the data file to give it as an argument, and second I'm unsure >> about using a debugging Kernel on a production server. I have heard that It >> will significantly slow down a machine. >> Any help or suggestions would be greatly appreciated. >> Ray > > Can anybody make any suggestions, or is there a better list to take this > question to? > Ray > Sorry mate, I really don't think you're going to have any luck. Memory testing requires access to parts of memory that the kernel's currently munching on. Run memtest86, or yank a few sticks and run it in another computer. Chris -- A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: questions about Fatal Trap 12
On Friday 03 April 2009 11:44:31 Ray wrote: > Hello, > I have received a kernel Trap 12 error several times now and am trying to > figure it out. > the error occurred today, and the previous time was about two weeks ago. > last time I had to run fsck manually if that proves anything. > > > uname -a gives the following: > > FreeBSD wserver..com 7.0-RELEASE-p3 FreeBSD 7.0-RELEASE-p3 #0: Wed > Sep 17 13:30:46 MDT 2008 > r...@wserver.*.com:/usr/obj/usr/src/sys/MOD amd64 > > > Google returns results mostly for versions 4.x and 5.x, but it suggest 2 > main things: > test ram, and kernel panic troubleshooting. > (http://www.freebsd.org/doc/en/books/faq/advanced.html#KERNEL-PANIC- > TROUBLESHOOTING) > > Is there a way to test the ram without removing it from the machine and > leave the machine functioning. I've used memtest 86 before, but obviously > the machine has to be offline for this test. > > However, I'm a little unsure of the instructions in the handbook on > troubleshooting. namely, it talks about using the nm command, but I can't > figure out the data file to give it as an argument, and second I'm unsure > about using a debugging Kernel on a production server. I have heard that It > will significantly slow down a machine. > Any help or suggestions would be greatly appreciated. > Ray Can anybody make any suggestions, or is there a better list to take this question to? Ray ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
questions about Fatal Trap 12
Hello, I have received a kernel Trap 12 error several times now and am trying to figure it out. the error occurred today, and the previous time was about two weeks ago. last time I had to run fsck manually if that proves anything. uname -a gives the following: FreeBSD wserver..com 7.0-RELEASE-p3 FreeBSD 7.0-RELEASE-p3 #0: Wed Sep 17 13:30:46 MDT 2008 r...@wserver.*.com:/usr/obj/usr/src/sys/MOD amd64 Google returns results mostly for versions 4.x and 5.x, but it suggest 2 main things: test ram, and kernel panic troubleshooting. (http://www.freebsd.org/doc/en/books/faq/advanced.html#KERNEL-PANIC- TROUBLESHOOTING) Is there a way to test the ram without removing it from the machine and leave the machine functioning. I've used memtest 86 before, but obviously the machine has to be offline for this test. However, I'm a little unsure of the instructions in the handbook on troubleshooting. namely, it talks about using the nm command, put I can't figure out the data file to give it as an argument, and second I'm unsure about using a debugging Kernel on a production server. I have heard that It will significantly slow down a machine. Any help or suggestions would be greatly appreciated. Ray ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
