[ltp] [T400] Tweaking temperature range for thermal sensors

Mateusz Loskot linux-thinkpad@linux-thinkpad.org
Fri, 8 Jun 2012 22:45:29 +0100

On 8 June 2012 22:41, Chris Schumann <chris@idlelion.net> wrote:
> On 6/8/12 4:31 PM, Mateusz Loskot wrote:
>> On 8 June 2012 21:51, Chris Schumann<chris@idlelion.net> =C2=A0wrote:
>>> On 6/8/12 3:41 PM, Mateusz Loskot wrote:
>>>> I'm tweaking thermal sensors control for Arch Linux on my T400.
>>>> I use thinkpad_acpi module.
>>>> I either set fan level manaly ACPI or use thinkfan utility.
>>>> I'm wondering, what is a typical range of temperature for HDD
>>>> during not HDD intensive tasks.
>>>> AFAIK, temperature of 50C or higher is dangerous for HDD.
>>>> Temperature range I have been observing on my laptop varies
>>>> between 36C and 43C. Does it sound right?
>>>> Could anyone point to any documentation regarding this?
>>>> I use Seagate Momentus 750 GB 7200 rpm (ST9750420AS)
>>>> p.s. I asked similar question on Thinkpad ml:
>>>> http://stderr.org/pipermail/thinkpad/2012-June/036915.html
>>> Specs for that drive:
>>> http://www.seagate.com/internal-hard-drives/laptop-hard-drives/momentus=
>>> TL;DR: operating temp is 0 to 60C.
>> Chris,
>> Thanks for reminding me to look at the obvious document.
>> It confirms the normal range, but it doesn't say anything about timing.
>> For example, is constant temperature at level of 40-45C for most of
>> operating time fine or too high?
>> I'm also trying to figure out what level of fan speed should I switch
>> for HDD temp<40C, what level to 40-45C, and what level>45C, etc.
> Mateusz,
> With that document, Seagate is warranting that the drive will operate
> correctly at 60C indefinitely. There is no note about duty cycle, or abou=
> duration at temperature. To me (who is not a lawyer), they have no caveat=
. I
> would not change my fan based on HDD temperature until it gets close to 6=


That makes perfect sense to me.

> FWIW, I have a T400 and run Fedora. I have never checked my HDD temperatu=
> or adjusted the fan thresholds.

And this is the voice of experience I've been looking for :)
I'm going to leave the thinkpad_acpi to set the fan level to auto and forge=


Best regards,
Mateusz Loskot, http://mateusz.loskot.net