disk spinning continuously + cpu possibly overheating = sudden
cswiger at mac.com
Sat Jul 9 14:29:38 UTC 2011
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 worst case situation, a modern hard drive doesn't use more than about 10W even under 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 getting too hot to touch just before this shutdown? If so, it's likely to be a problem 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?
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