i bet my hdd is hotter than urs

[joethemole]

maxtor 80gb 2mb.

idling at 50c lol. its suspended for vibration reduction.. which explains it cause its sandwiched between my dvd drive and my rheobus (which comes with heatsinks)

[defakto]

That's not really something you should not be proud of, you are really shortening the life of that drive by a significant amout. They are not meant to run that hot for any period of time.

[Ice Czar]

significant amount


the Arrhenius equation (http://www.shodor.org/UNChem/advanced/kin/arrhenius.html)

roughly translating to this rule of thumb
Each 10°C (18°F) temperature rise reduces component life by 50%
Conversely, each 10°C (18°F) temperature reduction increases component life by 100%.

[Elledan]

The Samsung 5400 RPM HDD in my main system is currently at 16C :p

I also suspended it, but I've added aluminium U-brackets to the sides, and there's a lot of space above and below it, with a decent amount of airflow.

Another HDD in this same system is at 30C right now, though. A Maxtor 7200 RPM one.

[awdark]

Why are your drives so cool?
First guys seems normal at 50c
My drives are at 106F which is ~41C and they often go up to the 50C.
I give them airspace above and below and yet they remain hot.

WD 160gb 7200rpm and WD 80gb 7200rpm

[klowngoblin]

you would be correct, my primary OS drive is 37°C and is at the very top of the case in a 5¼ bay, my music drive is 21°C and is behind 2 80mm fans, my raid drives i cant tell since SATA drives never work with HDDTUNE

[lithium726]

what do you guys use to moniter that?

i had a program a while ago that would, but it was shareware...

[defakto]

Why are your drives so cool?
First guys seems normal at 50c
My drives are at 106F which is ~41C and they often go up to the 50C.
I give them airspace above and below and yet they remain hot.

WD 160gb 7200rpm and WD 80gb 7200rpm

The optimum temp for harddrives is about 18 C or lower. Why do you think alot of data centers do their best to maintain a constant low temperature? It's better for all the electronics in the system. I've got a raptor with constant air flow over it that never goes above ambient room temp. Not even warm to the touch.

[joethemole]

even if i'm reducing its lifespan, it is only gonna last like 5 years instead of 10...

[awdark]

The optimum temp for harddrives is about 18 C or lower. Why do you think alot of data centers do their best to maintain a constant low temperature? It's better for all the electronics in the system. I've got a raptor with constant air flow over it that never goes above ambient room temp. Not even warm to the touch.

>_< really? 18c=64F! thats below room temperature (about 71F) only way I can think of to keep it lower is either huge heatsinks or heatsinks and fans... more noise
Ill sacrifice and keep the warmer drives and buy new ones when they go obsolete. ^_^

I use speedfan to check the temps.

[dano1122]

hdtune to monitor, google iit

[dano1122]

my samsung drive idles at 18c, roflitus

[Ice Czar]

>_< really? 18c=64F! thats below room temperature (about 71F) only way I can think of to keep it lower is either huge heatsinks or heatsinks and fans... more noise
Ill sacrifice and keep the warmer drives and buy new ones when they go obsolete. ^_^

I use speedfan to check the temps.

of course its not below ambient, at least not without phasechange :p
it could concievably be at ambient but more likely near it.

the answer is either phasechange (via direct which is unlikely, chilled water or air conditioner)
or a naturally low ambient, like Canada in early spring :p

an ugly hacked, cut and paste
--------------------------------------------------------------------------------------------------------------------------------

boning up on Fans might be helpful as well
its not just the airflow that is important, but the static pressure
a supply with a greater resistance will benefit from a higher static pressure



Air Flow Vs. Pressure Characteristics (http://www.comairrotron.com/engineering_notes_02.asp)
Parallel & Series Operation (http://www.sunon.com.tw/english/wealth/tech/tech-06.htm)
Stall of Axial Flow Fans
(http://www.comairrotron.com/engineering_notes_09.asp)
Basic Fan Laws (http://www.airturbine.com/tools/fanlaws.html?fan%20blades)
How to measure Airflow vs Pressure (http://www.sunon.com.tw/english/wealth/tech/tech-03.htm)
How to Achieve Low Noise (http://www.sunon.com.tw/english/wealth/tech/tech-07.htm)
Accoustic Noise (http://www.comairrotron.com/engineering_notes_03.asp)
EMI (http://www.comairrotron.com/engineering_notes_05.asp)
Introduction: Forced Convection Cooling (http://www.comairrotron.com/engineering_notes_01.asp)
How to select the right fan or blower (http://www.sunon.com.tw/english/wealth/tech/tech-04.htm)
Step 1: The Total Cooling Requirements
Step 2: Total System Resistance / System Characteristic Curve
Step 3: System Operating Point

-----------------------------------------------------------------------------------------------------------------------

there are three basic components to any thermal solution:
the heat transfer interface
(in this case the heatsink\waterblock total area)

the heat transfer medium's volume\pressure to time
(in this case for airflow, with additional variables like airflow resistance
w\ water flowrate and additional variables like turbulence, jet impingement)

and the temperature differential
(where using a cooler fluid air or water has a huge impact)

a real good computer oriented guide to thermodynamics
General Heat Transfer Guide (http://www.amdmb.com/article-display.php?ArticleID=105)

Heat transfer is all about temperature differentials. Conduction through materials and convection away from surfaces is proportional to the temperature differential that exists. Basically the thermal resistance of a given solution changes with the temperature differential, which is why thermal solutions are rated in °C/W which leaves that variable ambient open but gives you a formula

The heat transfer through the wall follows a simple equation:
Q=k/L(T1-T2)


We can draw some interesting conclusions from this equation. First, heat transfer is proportional to the temperature difference on the object. If the temperature differential doubles, the heat transferred doubles. Second, the conduction coefficient "k" is proportional to heat transfer. If the conduction coefficient doubles, the heat transfer doubles Alternatively, for the same differential temperature, twice as much heat may be transferred. The final observation is "L". As thickness increases, heat transfer decreases. Alternatively, to maintain the same heat transfer through a material twice as thick requires twice the temperature differential.

while that addresses conductance, there is a corrallary for convection (transfer from the heatsink to a fluid (air\water\ect)
its known as Newton's Law of Cooling (http://www.sosmath.com/diffeq/first/application/newton/newton.html)

----------------------------------------------------------------------

[Ice Czar]

hdtune to monitor, google iit


some drives simply dont have the ability however
upto the raptors (I think) none of the WD's did
at least the WD400 WD800 series didnt

so your reduced to an actual sensor attached externally

[_Korruption_]

some drives simply dont have the ability however
upto the raptors (I think) none of the WD's did
at least the WD400 WD800 series didnt

so your reduced to an actual sensor attached externally
Negative, MBM5 has a built in detection system. My PATA Seagate 120GB 7200.7 drive runs at 26C as it sits infront of the case intake. My PATA WD1200JB runs at about 35C because it sits inside an aluminum mobile rack/tray setup. I would think most any modern drive can report temperatures back using SMART.

- On the General tab of the MBM5 options, scroll down to the bottom and you'll see an option say ing "Scan for IDE harddrives with temp sensors" check that box, and reboot.

- Then in the temperature tab, drop down the dialog named "MBM 5 sensor", select an unused sensor.

- Then in the drop-down right below that, named "Should display board sensor", and select the name of your drive. My Seagate is named ST3120026A [0]

- You can now tweak the display options to your liking... I like the digital display on the dashboard instead of the VUM meters.

http://ww2.teamdr.net/korruption/images/mbm5.gif

The WD1200JB is reading zero because it is off (removable rack/tray), and my PSU doesn't have RPM monitoring. 100% CPU usage is for Folding@Home, go [H]! :o

[_Korruption_]

Bump, my chance to prove the Czar wrong! :p

[DougLite]

My WD1600JB has a (fairly accurate) thermal sensor

[klowngoblin]

http://i2.photobucket.com/albums/y28/pr5owner/lol.jpg

haha 14°C beat that!

[DougLite]

You do realize that there is a minimum safe temperature for a hard drive as well, and that condensation is a VERY bad thing for a hard drive? :p

[Canon]

Haha, LOL!

My HDD gets up to around 54 at times, it's around 48 right now... It's in a laptop though, nothing I can do about that. I backup so if it dies, it dies really. It's only a 4200 rpm drive too. Not sure if it's normal for the HDDs in laptops to get that warm of if my laptop just isn't designed well.

Apparently according to the spec sheets the max safe operating temp is 55 degrees, so that seems like a shortfall in the design of the computer to me.



http://www.hardfolding.com/ftag.php/mem/7651.png (http://www.hardfolding.com?go=38&id=7651)
The [H]orde needs You!

[lithium726]

Haha, LOL!

My HDD gets up to around 54 at times, it's around 48 right now... It's in a laptop though, nothing I can do about that. I backup so if it dies, it dies really. It's only a 4200 rpm drive too. Not sure if it's normal for the HDDs in laptops to get that warm of if my laptop just isn't designed well.

Apparently according to the spec sheets the max safe operating temp is 55 degrees, so that seems like a shortfall in the design of the computer to me.



http://www.hardfolding.com/ftag.php/mem/7651.png (http://www.hardfolding.com?go=38&id=7651)
The [H]orde needs You! my 7k2 60gb sits at about 41C most of the time, id say yous is a little hot...

[M0rph3us]

even if i'm reducing its lifespan, it is only gonna last like 5 years instead of 10...

hot Maxtor=dead. No questions asked, they just die without warning.

[Skrying]

My 7200RPM 80GB WD is currently at 44C at 32% load and my 5400RPM 80GB Maxtor is at 34C at 14.1% load.