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Date:	Sat, 3 Jul 2004 18:05:40 PDT7
From:	"J. R. Fox" <jr_fox@pacbell.net >
Reply-To:	scoug-help@scoug.com
To:	scoug-help@scoug.com
Subject:	SCOUG-Help: Re: On Thin Ice

Content Type: text/plain

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Tom Brown wrote:

> Re: Heat
> My 3 36 GiB SCSI drives are in a Bay-Cool III drive cooler from PC Power
> & Cooling. See:
> http://www.pcpowercooling.com/products/cooling/drive/bay-cool/index_bc3.htm

Will check this out. I've used good quality fans, but they can't last much
longer than the hard drives, right ?

> Re: Power supplies
> I use a 475 watt supply from the same source. The high power level is
> due to the fact that I run a Tyan Tiger MP S2460 motherboard (SMP). PC P
> & C supplies are some of the best around.
>
> http://www.pcpowercooling.com/products/power_supplies/

I believe my power supply (about two years old) probably is a PCP&C. I recall
stopping by their office / warehouse (in N. San Diego County, I think, just off
the 5 ?) during a trip, to pick it up. As I mentioned to Peter, it was either
a 425 or a 450, which should be more than adequate.

Jordan

>
> Again, HTH
>
> Peter Skye wrote:
> > J. R. Fox wrote:
> >
> >>I have had a problem like this at several-month intervals.
> >>Previously, it has stabilized and then things would be quiet
> >>for several months more.
> >
> >
> > I've had a number of these types of symptoms over the years, and most of
> > them were due to one of the following:
> >
> > -- 1. Heat. Leaving the case off can help. Sometimes the fan bearings
> > get dirty and spin slow. Sometimes the machine is in direct sunlight or
> > near some other source of heat. Sometimes the case is cramped between
> > things like desks and file cabinets so the heat can't escape from the
> > case. Is the case hot anywhere when you move your hand around on it?
> > Are any of the drives "too hot" when you touch them? Do you have enough
> > chassis space to leave empty bays between the drives for better
> > ventilation?
> >
> > -- 2. Power. As the power supply gets older it may not be able to
> > supply quite enough current. Try a heavy duty power supply. I know you
> > don't have an oscilloscope so I'm not gonna suggest that you watch the
> > power . . .
> >
> > -- 3. Dirty (oxidized) connectors. Pulling off the cables and pushing
> > them back on a few times makes everything work okay for a few more
> > weeks; when the problem occurs again you pull off the cables and push
> > them back on again, ad infinitum. I've also had an occasional bad cable
> > where either one of the ribbon wires has a problem (flexing the cable
> > while the system is running causes a failure) or the connector isn't
> > making a good connection with the cable (snip off the connector and
> > crimp on a new one). Try wiggling the cables around while the machine
> > is running and see if it fails.
> >
> > Good luck.
> >
> > - Peter
>
> --
> Tom Brown
> thombrown at san dot rr dot com
> Member SCOUG, V.O.I.C.E. & SDAA
> running eComStation GA + FP 3
> eCS system uptime is 0 days 00:42 hours
>
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