Machine check errors

Alban Hertroys dalroi at
Mon Jan 24 07:36:34 UTC 2011

On 24 Jan 2011, at 6:02, perryh at wrote:

> Alban Hertroys <dalroi at> wrote:
>> Ever since installing 7.4-PRERELEASE I'm seeing MCA machine check
>> errors on my home-server ...
>> MCA: Bank 0, Status 0xb622000000000135
>> MCA: Global Cap 0x0000000000000104, Status 0x0000000000000004
>> MCA: Vendor "AuthenticAMD". ID 0x662, APIC ID 1
>                       ^^^^^^^^^
>> MCA: Address 0x162933f0
> That's an error in the on-chip data cache.

It is, I saw that too.

> The first thing I would check is cooling.  Maybe one of the fans
> has quit working, or the air filter (if the box has one) has gotten
> clogged up with dust, so that the CPU is running hotter than it
> should.

It's amazing how your perception of acceptable temperature ranges rises with the actual average temperature. Turns out the last time I unclogged the dust filter on the case was longer ago than I thought it was. Good call!
Temperature went down from 55C to 46C over the last 10 minutes already...

I think I'm starting to appreciate the MCA feature already :)

Alban Hertroys

Screwing up is an excellent way to attach something to the ceiling.


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