disk spinning continuously + cpu possibly overheating = sudden
death
Manish Jain
invalid.pointer at gmail.com
Sat Jul 9 16:22:33 UTC 2011
Hi Chuck,
What do I make of it when the system runs flawlessly both on Win XP
and FreeBSD-8.0-amd64 ? BTW, 8.2 does NOT - for reasons unfathomable
to me - install /usr/sbin/apmd. I don't know how significant that is,
but I have had to insert into rc.conf :
apm_enable="NO"
apmd_enable="NO"
Thanks for any help.
Regards
Manish Jain
[1]invalid.pointer at gmail.com
On 09-Jul-11 19:59, Chuck Swiger wrote:
On Jul 9, 2011, at 3:53 AM, Manish Jain wrote:
I am running FreeBSD-8.2-amd64 on a Western Digital 320 GD disk and a
quad-core AMD Phenom processor. After booting, the disk keeps
continuously (meaning continuous I/O) and after a couple of hours (on
the console with the X server not running), suddenly the whole system
dies, powering off in a flash. I suspect the continuous I/O is causing
is a CPU overheat which results in this behaviour.
While you probably do have flaky hardware causing problems, even under the wors
t case situation, a modern hard drive doesn't use more than about 10W even unde
r full load (ie, continuous writes). Compare that with the 125W thermal design
rating of a 4-core Phenom. If your system is overheating, it's not because of
what a hard drive is doing.
It should be easy to tell if thermals are an issue-- is the CPU heat sink getti
ng too hot to touch just before this shutdown? If so, it's likely to be a prob
lem with a cooling fan or heatsink attachment.
Also, what is it that makes you think your disk is doing continuous I/O?
What does "iostat 5" or similar show?
Regards,
References
1. mailto:invalid.pointer at gmail.com
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