[rescue] "In My Way", 2015 Edition

Patrick Giagnocavo xemacs5 at gmail.com
Tue Apr 7 17:18:19 CDT 2015

Some of these servers, with their multiple fans, have a "beat" or "ringin"
sound, as the fans don't spin at precisely the same speed.  So you have a
periodic louder tone as all the fans make noise in synchronicity, which
then subsides as they move out of phase; then grows louder again.

On Tue, Apr 7, 2015 at 3:30 PM, Carl R. Friend <crfriend at rcn.com> wrote:

>    On Tue, 7 Apr 2015, Lionel Peterson wrote:
>  The V240 is rated at 'under' 7.1 bels -
>> http://www.andovercg.com/datasheets/sun-fire-v240-server.pdf
>    I believe that normal human conversation takes place at around
> 68 decibels (6.8 b), so being close to a V240/245 would make polite
> conversation difficult.  There's also the character of the noise;
> most of it comes from either 2 or 4 10,000 RPM mini-fans attached
> to the CPU heat-sinks (if you have one CPU you have two of the
> dratted things; 2 CPUs, 4 fans).  The noise footprint adds up fast.
>    If you get one, stock up on the heat-sink fans; they do not have
> a long service life, and you'll fry the CPUs if both die at the same
> time and the thing doesn't power off.
>    They're delightful machines in a commercial setting, but would be
> rather too loud in a residential setting.  I also believe they're FCC
> Class-A equipment, not that that matters much to the crowd here.  I'd
> like a couple here for occasional use, but blanch at the thought of
> sharing my study with them.
>    Cheers!
> +------------------------------------------------+---------------------+
> | Carl Richard Friend (UNIX Sysadmin)            | West Boylston       |
> | Minicomputer Collector / Enthusiast            | Massachusetts, USA  |
> | mailto:crfriend at rcn.com                        +---------------------+
> | http://users.rcn.com/crfriend/museum           | ICBM: 42:22N 71:47W |
> +------------------------------------------------+---------------------+
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