Re: FreeBSD Crash without Errors, Warnings, or Panics

Andrew MacIntyre wrote:
Alex Zbyslaw wrote:

{...}

Several times now I have had Linux servers (and production quality ones, not built by me ones :-)) die in a somewhat similar fashion. In every case the cause has been either a flaky disk or a flaky disk controller, or some combination.

I've seen an instance of somewhat similar symptoms where a power supply
was sagging out of spec on one supply rail some time after startup.
When some disk activity happened, the extra power consumption caused the
voltage to sag further triggering the disk going AWOL.

At the time this started to happen, the power supply was more than 12
months old.

-------------------------------------------------------------------------
Andrew I MacIntyre "These thoughts are mine alone..."
E-mail: andymac@xxxxxxxxxxxxxxxxxxxxx (pref) | Snail: PO Box 370
andymac@xxxxxxxxxxx (alt) | Belconnen ACT 2616
Web: http://www.andymac.org/ | Australia
_______________________________________________
I considered power problems, however the server has dual redundant 400 Watt power supplies, and is in a server room and none of the other machines in there are having problems like this one. I suppose it is possible that both supplies are failing, but that seems highly unlikely?

Matthew

_______________________________________________
freebsd-hackers@xxxxxxxxxxx mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-hackers
To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@xxxxxxxxxxx"

Relevant Pages

  • Re: FreeBSD Crash without Errors, Warnings, or Panics
    ... In every case the cause has been either a flaky disk or a flaky disk controller, ... the extra power consumption caused the ... I considered power problems, however the server has dual redundant 400 Watt power supplies, and is in a server room and none of the other machines in there are having problems like this one. ...
    (freebsd-hackers)
  • SUMMARY: Calculating power and AC requirements for a server room
    ... "What do you do for UPSes, or is that designed into the server room? ... and they have some good specs for power ... "I give our facilities guys the max current draw for each server so they ...
    (SunManagers)
  • Re: Server Room
    ... Emergency electrical power system ... Local Area Network (LAN) ... > How to design a good server Room? ...
    (RedHat)
  • Re: The lusers are loose
    ... If no peers are present, ... the server room is. ... He ran into problems getting the power back on and our ... least 10:00 that the lusers started calling saying their terminals had been ...
    (microsoft.public.cert.exam.mcse)