At 05:54 AM 4/19/2007, Dimitris Zilaskos wrote:
Dear all,
I am trying to understand some long standing issues we have with freebsd
and Dell servers.
Over the last 3 year we have installed freebsd 5.x and 6.x, with currently
deployed version being 6.1, to a variety of of Dell rack mounted systems.
The Dell systems used so far are Poweredge 1750, 2950 (both scsi), and
sc1425 (sata). All of them are dual CPU Xeon systems.
All these systems serve as mail/web servers, with 2 to 15 jails.
Installation has always proceeded normally without problems. However,
after a few months of operation, all of these systems, purchased at
different moments during the last 3 years, will begin rebooting randomly
or freezing completely.
These reboots/freezes will at first occur once per 6 months, then
gradually will move to to once per month, to normally stabilize around
once per week, but in the case of the 1750 system once it even happened
twice a day.
Load does not seem to matter, since even after shutting down all services
in the servers, still random reboots occured.
So far we tried various tricks digged from the archives, like disabling
ACPI, HT, but nothing changed.
We have migrated some systems that had these issues to RHEL compatible OS,
and they run rock solid under heavy load.
Right now I have enabled kernel crash dumps and I am waiting for the next
crash. But I understad a lot of people use FreeBSD with Dell servers, and
I would like to listen on how to tackle this situation we are facing.
First make sure you are up-to-date on the FreeBSD version you are running,
also make sure it is still a supported release. If not, update your src
and rebuild everything.
For the hardware I'd run complete diagnostics from dell on one of these
servers, and any stress tests available as well. If the hardware all
checks out OK, I would look for either an environmental cause such as
heat. Heat can cause hardware problems that wouldn't show up
otherwise. If neither of these looks like the cause, then you may need to
swap-out a system board, or RAM as it must be a hardware issue.
-Derek
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