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David Baron 10-26-2008 09:06 AM

High Disk Temperatures
 
Got my new WDC800 disk up and running, LVM (fantastic tool!). 2.6.26-rt now
boots without problems.

I have noted that during high disk access rates, the temperature of the WDC
soars (from a 33c idle to up to 44c!). Such high temperatures are not
desirable.

Is there an app or daemon that can be coupled with the temperature monitor or
to ksensors that can reduce disk access rates at a certain limit temperature?

There seems to be some internal sleep function in this disk.




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Hugo Vanwoerkom 10-26-2008 10:54 AM

High Disk Temperatures
 
David Baron wrote:
Got my new WDC800 disk up and running, LVM (fantastic tool!). 2.6.26-rt now
boots without problems.


I have noted that during high disk access rates, the temperature of the WDC
soars (from a 33c idle to up to 44c!). Such high temperatures are not
desirable.


Is there an app or daemon that can be coupled with the temperature monitor or
to ksensors that can reduce disk access rates at a certain limit temperature?


There seems to be some internal sleep function in this disk.






I have a case fan pointing at 2 of my HDD's + record the temps every 5
min's:


...
Oct 26 06:24:08 debian do_modtemp_hdd[4646]: /usr/bin/do_ck_hda = 15 (277)
Oct 26 06:24:08 debian do_modtemp_hdd[4646]: /usr/bin/do_ck_hdc = 22 (277)
Oct 26 06:24:08 debian do_modtemp_hdd[4646]: /usr/bin/do_ck_sda = 0 (284)
Oct 26 06:24:08 debian do_modtemp_hdd[4646]: /usr/bin/do_ck_temp1 = 15 (277)
Oct 26 06:24:09 debian do_modtemp_hdd[4646]: /usr/bin/do_ck_gpu0 = 0 (284)
Oct 26 06:24:09 debian do_modtemp_hdd[4646]: /usr/bin/do_chrony2 =
execute (292)

Oct 26 06:24:09 debian do_modtemp_hdd[4646]: 5 records (300)

...
Oct 26 06:40:03 debian do_modtemp_hdd[4646]: 18 25 0 16 33 (201)
...

do_ck_hda/hdc/sda are scripts that return the result of:


smartctl -a -d ata /dev/hda|grep '194 ' |awk '{ print $10 }'

and do_ck_gpu0 returns the temperature of the videocard gpu:

nvidia_script | grep debian:0| awk '{ x=substr($4, 0, length($4) - 1);
print x }'



hda's temp is obviously wrong because the room temp is 21C and so is
temp1, the mobo ambient temp.


Hugo




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Johannes Wiedersich 10-26-2008 11:02 AM

High Disk Temperatures
 
On 2008-10-26 11:06, David Baron wrote:
> I have noted that during high disk access rates, the temperature of the WDC
> soars (from a 33c idle to up to 44c!). Such high temperatures are not
> desirable.

I don't think that 44 C is too high a temperature for a hard disk.
How do you come to your different assumption?
What are the exact specifications for your disk?
What does smartctl (from smartmontools) tell you?

If you'd want to reduce the temperature of the disk, I'd try to increase
the airflow aroud the disk in the first place.

HTH,

Johannes


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"Manon Metten" 10-26-2008 06:01 PM

High Disk Temperatures
 
Hi David,

On Sun, Oct 26, 2008 at 11:06 AM, David Baron <d_baron@012.net.il> wrote:

> Got my new WDC800 disk up and running, LVM (fantastic tool!). 2.6.26-rt now
> boots without problems.
>
> I have noted that during high disk access rates, the temperature of the WDC
> soars (from a 33c idle to up to 44c!). Such high temperatures are not
> desirable.


Quote from Wikipedia:

"A common misconception is that a colder hard drive will last longer
than a hotter hard drive. The Google study seems to imply the reverse
-- "lower temperatures are associated with higher failure rates". Hard
drives with S.M.A.R.T.-reported average temperatures below 27 C had
failure rates worse than hard drives with the highest reported average
temperature of 50 C, failure rates at least twice as high as the
optimum S.M.A.R.T.-reported temperature range of 36 C to 47 C."

http://en.wikipedia.org/wiki/Hard_disk_drive

Manon.


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"Dotan Cohen" 10-27-2008 02:50 PM

High Disk Temperatures
 
2008/10/26 Manon Metten <manon.metten@gmail.com>:
> Hi David,
>
> On Sun, Oct 26, 2008 at 11:06 AM, David Baron <d_baron@012.net.il> wrote:
>
>> Got my new WDC800 disk up and running, LVM (fantastic tool!). 2.6.26-rt now
>> boots without problems.
>>
>> I have noted that during high disk access rates, the temperature of the WDC
>> soars (from a 33c idle to up to 44c!). Such high temperatures are not
>> desirable.
>
>
> Quote from Wikipedia:
>
> "A common misconception is that a colder hard drive will last longer
> than a hotter hard drive. The Google study seems to imply the reverse
> -- "lower temperatures are associated with higher failure rates". Hard
> drives with S.M.A.R.T.-reported average temperatures below 27 °C had
> failure rates worse than hard drives with the highest reported average
> temperature of 50 °C, failure rates at least twice as high as the
> optimum S.M.A.R.T.-reported temperature range of 36 °C to 47 °C."
>
> http://en.wikipedia.org/wiki/Hard_disk_drive
>
> Manon.
>

The thing that kills harddrives (and most other components) is heat
cycles, not heat. Cooling, heating, cooling, heating is very
stressful. Just staying hot is not.

--
Dotan Cohen

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