Typical mains power for mid-range PC?

kony wrote
Rod Speed wrote
kony wrote
Rod Speed wrote
kony wrote
Rod Speed wrote
Jon D wrote

If I have a hard drive which has a protective sheet of metal
on one side and the circuit board on the other side then
which of these two side should get the most cooling?

Varys with the drive design. The only real way to answer that
question is to try it both ways and monitor the drive SMART temp.

NO, it does not vary per drive design,

Fraid it does. Most obviously with the older Barras which
have a metal plate and rubber mat over the logic card etc.

plate and rubber don't suddenly make
a cover plate more conductive than it is,

It does however mean that the LOGIC CARD gets significantly less
cooling from the airflow than with drives with exposed logic cards, child.

Yes clueless one, that makes the airflow
over that area all the more important.

No it doesnt, those drives clearly dont get rid of the heat from the logic that way.

And have fun explaining why Seagate doesnt say that its crucial
to have a high airflow rate over that side of those drives either.

Keep desperately digging, you'll be out in china all over again any day now.

if you cool the area with longest conduction path and least
tRise, you've let the rest get hotter than it otherwise would.

Irrelevant waffle to that stupid pig ignorant claim that
all drives are the same on that cooling question, child.

Rod, what's with this "child" notion?
I may easily be older than you.

Bet you aint, child.

And more important, I don't have the
need to BS my way out of a paper bag,

You clearly do.

or rather, all drive designs are putting the board
on the bottom, and a thin cover on the top,

Plenty of top covers arent thin.

On modern drives?

Yep.

Which ones?

Depends on how you define modern, child.

Ah, so you have nothing, just a black hole of knowledge.

Never ever could bull**** its way out of a wet paper bag.

thus need more cooling on the bottom
circuit board than (if any on) the top cover.

Not a ****ing clue, as always. Plenty of drives still get
rid of quite a bit of heat thru the metal body of the drive.

Bottom, yes. The top only gets hot as a function of how hot
the interior was, because the bottom wasn't cooled enough,

Not a ****ing clue, as always.

Didn't need a clue.

Corse you do.

Drives run cool here, unlike those you keep mentioning
as warm or hot, every 3rd thread about HDDs.

Never even mentioned hot, you silly little pathological liar.

Did it ever occur to you that you might have no concept
whatsoever about the most basic fundamentals of HDD cooling?

Never ever could bull**** its way out of a wet paper bag.

ALL it takes is to MEASURE the drive temp with the SMART temp, child.

Really Rod, it's not a hard thing... you argue that you
know something and yet drives are warm, contrasted
with the opposing strategy that results in cool drives.

Only a fool furiously drives air over drives
when their temp is below 40C child.

Seems almost ironic.

Never ever could bull**** its way out of a wet paper bag.

and of course a minor friction of platter/air inside the chamber
but again, it is not only as well but better cooled by the bottom
because the top is still secured by a gasket material which impedes
heat transfer from other portions of the drive which likewise heat up.

Not a ****ing clue, as always.

And have fun explaining how come some drive
manufacturers explicitly state that the drive temp
limits apply to a specific location on the top cover, child.

Show us this spec Rod.

How many of you are there between those ears, child ?

http://www.hitachigst.com/tech/techlib.nsf/techdocs/CE3F5756C827F35A86256F4F006B8AD4/$file/7K500_spv1.3.pdf
http://www.hitachigst.com/tech/techlib.nsf/techdocs/67E6793B17F602DF86256E460065F563/$file/7K400_spv1.6.pdf
Sec 7.2.1, first note, child.
You'll find that with the bulk of their drives too.

You've made up so much BS recently I can't
take anything you write at face value anymore.

Got a VERY large towel handy for your face, have you child ?

Oops, I deleted the rest of the post. Was it a loss or did you
just write something about BS and paper bags a few dozen times?

Never ever could bull**** its way out of a wet paper bag.

On Sat, 29 Jul 2006 02:49:06 -0400, kony Gave us:

On Sat, 29 Jul 2006 07:56:58 +1000, "Rod Speed"
wrote:

Jon D wrote

If I have a hard drive which has a protective sheet of metal
on one side and the circuit board on the other side then
which of these two side should get the most cooling?

Varys with the drive design. The only real way to answer that
question is to try it both ways and monitor the drive SMART temp.



NO, it does not vary per drive design, or rather, all drive
designs are putting the board on the bottom, and a thin
cover on the top, thus need more cooling on the bottom
circuit board than (if any on) the top cover.

In the majority of drives, the top cover is barely (if at
all) even joined to the rest with a reasonably conductive
junction, instead they typically have a silicone or some
other type of flexible gasket. They may feel warm but this
is more a function of heat rising because it wasn't removed
more immediately from the hot areas instead of left to heat
up surrounding areas.

I'm sure you'll argue Rod, but you're quite wrong in general
and offhand I don't recall any hard drive EVER MADE that
needed as much, let alone more cooling on the top metal.

In other words, a drive can be completely cooled with
airflow over the bottom only. It cannot with airflow only
over the top.

This is correct. ALL drives are made such that the platters and the
"clean room" box they are in operate at a soaked temperature that is
fairly warm to human touch. Most also keep their lid disconnected
from the main body of the "platter box", thermally speaking. The heat
that lid exhibits is 100% due to the air temp in the platter box.

The exposed spindle driver/controller board on the bottom of the
drive is what is supposed to be cooled, and that is why it is not
"inside" the drive case. It is highly emissive due to the way chip
maker package their chips in a matte finish package. It is so they
can radiate their heat in a manner other than mere conduction through
the lead frame.

On Sat, 29 Jul 2006 17:52:52 +1000, "Rod Speed"
Gave us:

NO, it does not vary per drive design,

Fraid it does. Most obviously with the older Barras which
have a metal plate and rubber mat over the logic card etc.

You are full of ****.

Some drive makers place such things on their SPINDLE driver sections
of their PCBs. Very few drives have multiple PCBs in them now (not
including within the plater/head box), and both the spindle drivers as
well as the CONTROLLER electronics are integrated together on that one
board.

There are plenty of drives, even the 10k RPM versions that have no
sinking metals on this board at all. There are some that do.

So it doesn't vary by design so much as by manufacturer. It is not
required, and the bottom of the drive is STILL the place where cooling
air currents should be directed.

On Sat, 29 Jul 2006 17:52:52 +1000, "Rod Speed"
Gave us:

or rather, all drive designs are putting the board
on the bottom, and a thin cover on the top,

Plenty of top covers arent thin.

Now, you are a semantical twit.

A 20 Ga stainless lid is quite stiff. but to someone used to heavier
sheet steel calling it thin is NOT incorrect. For you to assume he
meant foil thin is just more proof of how pedantic (and ignorantly so)
you are.

On Sat, 29 Jul 2006 17:52:52 +1000, "Rod Speed"
Gave us:

Not a ****ing clue, as always. Plenty of drives still get
rid of quite a bit of heat thru the metal body of the drive.

Drives exhibit heat on all their surfaces. The emissivity of the
surface determines the degree to which they radiate. A shiny polished
lid has a relatively low emissivity, and yes, surface finish does
matter. That is why chips have matte finishes.

I have drive mounts that do not have conduction paths for heat
through them. The drives are cooled completely by air currents.

On Sat, 29 Jul 2006 17:52:52 +1000, "Rod Speed"
Gave us:

In the majority of drives, the top cover is barely (if at all)
even joined to the rest with a reasonably conductive junction,

Not a ****ing clue, as always.

You are full of ****. How many drives have you ever seen open?

That won't matter because you are too ****ing clueless to know what
the engineers were doing when they designed the drive.

"kony" wrote

Rod, what's with this "child" notion?
I may easily be older than you.

Kony,

Just filter him out! It's heaven.

--
Ed Light

Smiley :-/
MS Smiley :-\

Send spam to the FTC at

Thanks, robots.

Bring the Troops Home:
http://bringthemhomenow.org

On Sat, 29 Jul 2006 17:52:52 +1000, "Rod Speed"
Gave us:

instead they typically have a silicone
or some other type of flexible gasket.

Separate matter entirely.

Not when the subject is thermals, you ****ing utter retard.

On Sat, 29 Jul 2006 17:52:52 +1000, "Rod Speed"
Gave us:

Have fun explaining how come that cover STILL gets
warm even when the drive is mounted upside down.

You're an idiot.

The air inside the platter box is virtually motion free, yet air has
a pretty good conduction rate to surfaces it is against when it is hot
air. The lid temp will not change much, if at all, regardless of the
physical mounting configuration for the drive.

That does not include using the lid as a conduction cooling element
against a metal surface. We are talking about bare lids here.

Squirm, you retarded twit.

On Sat, 29 Jul 2006 17:52:52 +1000, "Rod Speed"
Gave us:

Never ever could bull**** its way out of a wet paper bag.

Do you always spew the same old tired CRAP to everyone that disagrees
with you, boy?