On Sun, May 17, 2009 at 9:13 AM, Doug Lee <d...@dlee.org> wrote: > On Sun, May 17, 2009 at 07:39:46AM -0400, Glen Barber wrote: > > On Sun, May 17, 2009 at 7:06 AM, Doug Lee <d...@dlee.org> wrote: > > > One of the weirder things I've seen in a while here... > > > > > > OS: FreeBSD 4.11 (yeah I know, old, but generally stable) > > > CPU: Intel(R) Pentium(R) 4 CPU 2.00GHz > > > real memory ?= 536608768 (524032K bytes) > > > Hds: IDE > > > > > > Do you by chance have the kernel built with debugging enabled? > > Afraid not, nor much space in / for that. I partitioned this system > before /modules arrived, and I barely have enough space in / now > (about 3 meg free). That shouldn't affect this issue though; I do > have separate /usr, /var, and /tmp. I do mount /tmp and /var/run via > MFS. > > > > Problem: ?Ever since a suspitious power outage (I say suspitious > > > because we think a surge was also involved), this box has been > > > exhibiting kernel panics about every 23 hours 55 minutes, give or > > > take about 4 minutes either way. ?Obviously hardware is suspect, > > > and hopefully in line for upgrade; but as FreeBSD has always proven > > > so stable for me, I'm curious what on earth could cause this sort > > > of regular panic? > > > > > > It's not time of day; if I reboot at 2:00 AM, 3:55 PM, or any other > > > time, it's 23:55 or so later I get a panic, whenever that may be. > > > I think this rules out cron jobs, external attacks, and load-based > > > issues. > > > > > > Perhaps a bad CMOS battery causing the system time to become > > corrupted? (I know it's a long shot...) > > Interesting idea, though I'd be surprised since I think the system > time is set via ntpd, is it not? `date' seems to recover nicely every > time anyway. A power surge could indeed play with CMOS though... but > how would I test for this while the system is running? > > -- > Doug Lee d...@dlee.org http://www.dlee.org > SSB BART Group doug....@ssbbartgroup.com > http://www.ssbbartgroup.com > "Pray devoutly, but hammer stoutly." > --Sir William G. Benham >
Another problem may be as follows : I am living an area nearby to industrial factories . When they are started or stopped . they are causing important fluctuation in my home current in such a way that even uninterruptible power supplies are becoming not able to balance their effects . Such an effect may be present in your area . In that hour regularly such a system may start and cause a current fluctuation that it may boot your computer(s) . Thank you very much . Mehmet Erol Sanliturk _______________________________________________ firstname.lastname@example.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"