[wellylug] cpu temperature reported incorrectly

[Chris Hodgetts]

It is a 10gig Laptop drive, but has a VIA controller..

Yeah, at my old job, we had a bunch of Compaq's that had that same
problem.

Actually -- to be fair, the harddrive and CDROM is the only part of my
laptop that Compaq have not had to replace...



On Fri, 2004-10-29 at 13:34 +1300, Peter Jones wrote:
> 
> -----Original Message-----
> From: Chris Hodgetts [mailto:chris at archnetnz.com]
> Sent: Friday, 29 October 2004 1:19 p.m.
> To: wellylug at lists.wellylug.org.nz
> Subject: Re: [wellylug] cpu temperature reported incorrectly
> 
> 
> I am not sure about CPU Temps.... but I know my harddrive gets fairly
> warm!!
> 
> jenna:/home/chris# hddtemp /dev/hda
> /dev/hda: FUJITSU MHN2200AT: 42 C
> jenna:/home/chris#
> 
> 
> Is this a 10 or 20 gig Fujitsu? Does it have a Cirrus Logic controller? 
> (The main IC on the drive board)
> 
> There was a huge rash (eg over 6 million worldwide) of Fujitsu HDD failures 
> (I must have changed a hundred or more in Compaqs, under warranty), 
> caused by this IC. I don't recall the exact details but my understanding 
> is heat caused electrons to migrate to places where they shouldn't have 
> within the IC. Compaqs instructions to aleviate the problem were to avoid 
> having the drive powered on for extended periods 
> 
> http://h30066.www3.hp.com/hddr/overview.asp?c1=5&c2=8&cc=ca&lc=eng&action=L
> 
> Quote "Based on the information from Fujitsu, the issue may arise under
> certain 
> conditions, such as 24X7 operation, high heat and humidity and failure to
> employ power save features"
> 
> 
> 
> 
> 
> On Thu, 2004-10-28 at 17:09 -0700, Brent Wood wrote:
> > --- Gordon Paynter <lists at paynter.info> wrote:
> > 
> > > I have an Athlon XP, and I have overheating problems: I have a SFF
> Shuttle 
> > > (SK41G) I brought back from the states, which uses a funny
> heat-extractor 
> > > pipe, but which overheats if I leave the case on and run with a full CPU
> load
> > > for a few minutes. (My solution has been to leave the case off, I
> believe the
> > 
> > Umm... I'd have to say that is unusual. The Shuttle heat pipe is one of
> the
> > best engineered cpu cooling systems I've come across - except for the
> Creative
> > Labs Slix, which copied the Shuttle. The only overheating I've ever had in
> one
> > was with either a flaky cpu or a badly assembled unit. (I know the cpu ran
> too
> > hot coz I pulled it & swapped with a conventional m/b & cpu, the cpu still
> > stayed hot. The Shuttle box ran nice & cool with the other cpu.)
> > 
> > Is the copper shim installed correctly between the cpu & heat sink? I've
> had to
> > fix a couple where the person (supposedly a professional) didn't bother to
> > install it so the cpu's ran too hot.
> > 
> > 
> > Does the fan speed up before shutting down? How do you know it is a cpu
> temp
> > induced shutdown? (does the over temp LED come on?)
> > 
> > Also note, as the Shuttle heat pipe vents the cpu heat directly outside
> the
> > case, with minimal internal heat dissipation, taking the cover off should
> have
> > close to zero effect on core cpu temperature. It will probably reduce the
> > graphics card & power supply temperatures though.
> > 
> > In a PC case where the cpu heat is vented internally, with a conventional
> cpu
> > heatsink/fan, opening the case will often let the warm air escape more
> readily,
> > so opening the case will often cool all the components down. Quite
> different in
> > a Shuttle.
> > 
> > > 
> > > correct solution is to remove the heat sink, reapply the thermal gell,
> and 
> > > re-seat the heat sink.) 
> > 
> > Worth doing if it will stop the cpu overheating. Doesn't take long, but a
> bit
> > fiddly in those little cases.
> > 
> > 
> > Cheers
> > 
> >   Brent
> > 
> > 
> -- 
> Chris Hodgetts <chris at archnetnz.com>
> 
> 
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> 
> 
-- 
Chris Hodgetts <chris at archnetnz.com>