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From: Bonge Boo on 6 Sep 2006 14:44
Paul Russell wrote:
> Bonge Boo wrote:
>
>> Graham J Lee wrote:
>>
>>> On 5/9/06 21:02, Bonge Boo wrote:
>>>
>>>> Graham J Lee wrote:
>>>>
>>>>> On 5/9/06 18:25, Bonge Boo wrote:
>>>>>
>>>>>> Anyone got an Xserve they can login to?
>>>>>>
>>>>>> What fan speeds have you got? I've got an incredibly noisy one,
>>>>>> all fans bar PCI are on 12,000rpm. I can't get the bloody thing to
>>>>>> shut up.
>>>>>>
>>>>>> Nothing showing up in top that's eating cycles...
>>>>>
>>>>> So what are the various temperatures and voltage or current readings?
>>>>
>>>>
>>>> Hang on...
>>>>
>>>> CPU1 Inlet 37C
>>>> CPU1 Ambient 45C
>>>> CPU1 Internal 48C
>>>> CPU2 Inlet 31C
>>>> CPU2 Ambient 39C
>>>> CPU2 Internal 55C
>>>>
>>>> System Controller and memory seems hottest at 57C
>>>>
>>>
>>> OK, I'm seeing CPU Ambient temps of 24/23, and Internal of 50/45.
>>> Memory is 52, PCI 50, Controller is 49 so yours *is* running hot; I'm
>>> only measuring one of my Xserves, but it's one I'm stressing by
>>> NetRestoring from it over NFS to an entire lab. My other is much
>>> cooler.
>>>
>>> For comparison, the fan speeds on that hotter machine are all
>>> ~5400rpm, except SysController (7200) and PCI slot (5700). Yours is,
>>> indeed, going mad.
>>>
>>>>> What kind of environment is it in?
>>>>
>>>>
>>>> Sitting on the top of a trolley with nothing obstructing front or
>>>> back vents. It does have a big fax machine sitting on it. Do they
>>>> dissipate much through the top case?
>>>>
>>>
>>> "On top of a trolley" and "big fax machine sitting on it" suggests
>>> it's not in a rack, there's definitely no airflow over or under the
>>> machine and nothing driving air around it at all...apart from the
>>> fans driving air through. Perhaps you missed the bit on p21 of TFM
>>> where it says "To ensure safe and smooth operation of your server,
>>> it's essential that you plan for proper location of the server in its
>>> rack, adequate power to the components in the rack, and the
>>> appropriate operating environment for the rack"?
>>
>>
>> There is no location to put a rack in. The only possible place for it
>> is where it is. Whilst I'd love to sell them a rack for the Xserve, a
>> 1U rack just ain't possible. So we're saying that it requires
>> sufficient airflow over he surface of the case, not just through the
>> intakes?
>>
>> Paul, it your's racked?
>
> Mine's not racked but, as I mentioned earlier, I put some stick-on feet
> on the bottom to raise it off the shelf that it sits on, which helps
> with air flow and also helps to reduce the "sounding board" effect.
> There is also nothing else on top of it, so it gets reasonable air flow,
> both top and bottom.

I'll see if I can persuade them to move the fax machine and stick some
risers under it.
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