Just a point of reference:
APC: www.apc.com
UPS: uninterruptible power supply
On Jul 18, 2005, at 5:30 PM, Derick Centeno wrote:
It does make sense to check that your computer area is properly
cooled. However, you must not only check for heat you must also check
for humidity.
You can check the computing environment simply with a nice clock which
has a temperature and humidity dial, some also come with barometric
pressure dials.
Of course that is only useful if you know the manufacturer's published
recommendations as to what environmental tolerances your computer (and
each individual peripheral) should operate at best AND worst. That
information is there, just for this kind of situation.
The behavior as you describe it is typical of computers protecting
themselves without notifying either users or system administrators
which is why serious systems serving lots of people have always been
located in one centralized environmentally controlled area which was
constantly monitored. Don't be surprised that a lot of people don't
know about this or won't discuss it. Expertise and knowledge
regarding all this have moved upscale.
Another source of problems computers is power, such as too much
(powersurges), too little (brownouts), Lightning strikes, and more.
Most, if not all can be handled with a sufficiently stable and
reliable UPS. If you don't want to screw around, and your equipment
matters to you, get an APC ups. Get a UPS which will support your
system (that is run (as in provided power to) your ENTIRE computing
environment (printers, servers, routers, etc.) just from it (all by
it's lonesome) for at least 15 minutes. Giving you time to backup and
then shutdown everything. Without a UPS, you have exactly the kind of
behavior you describe.
All this means that one behavior can have several different causes.
It is up to you to identify which it is.
OK. Let's imagine you did all that. What next?
Double check that your system settings are what you expect them to be.
No auto-shutdown presets on. No powersavers on unless you control
precisely when. And so on.
Of course, some people would check those settings first.
Best wishes...
On Jul 18, 2005, at 3:59 PM, Jackson Jones wrote:
I have a Quicksilver Powermac G4 Quicksilver Tower that randomly
powers off (not a clean shutdown).
933Mhz G4 (single Processor)
1 Gig of RAM
YellowDog Linux 4.0.1 with all "yum update"
Stock kernel
NVidia GeForce 2 video card
Has anyone seen this, or run into this before.
Thanks
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