On 10/27/2017 03:10 PM, D Greig wrote:
> On 27/10/17 20:46, Pat Riehecky wrote:
>>
>>
>> On 10/27/2017 02:17 PM, D Greig wrote:
>>> On 27/10/17 17:24, D Greig wrote:
>>>> Hi,
>>>>
>>>> I am looking for help on how to stop/disable the HDD spin down option
>>>>
>>>
>>> I should add that the laptop has a fresh(yesterday) install of SL7.4.
>>>
>>> "hdparm" was not present on the system, so I installed it from SL repo.
>>>
>>> Now I am unsure as to the safest way to use it for the task.
>>>
>>> In the past spindown is disabled by default.
>>>
>>
>> This should probably get you going:
>> https://urldefense.proofpoint.com/v2/url?u=https-3A__wiki.archlinux.org_index.php_hdparm-23Persistent-5Fconfiguration-5Fusing-5Fudev-5Frule&d=DwICaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=OAMtP0DWou0nlXG7Kmxo2enjXJfwb1DXS9fwcaESuTE&m=C1UH-_9koxexcg6HnyvwhfaZYbBiIvZquLGNYTxC38I&s=Ng2gXtcH7z8wLQGWIyJC_oBiIH6sRt2h1_41pCY7GEg&e=
>>
>>
>
> Hi Pat,
>
> That led to a fix.
>
> Many thanks.
>
> hdparm -B 255 /dev/sda
> Sorted it.
>
> now:
> [root@mu dg]# hdparm -B /dev/sda
>
> /dev/sda:
> APM_level = off
> [root@mu dg]# hdparm -B /dev/sda
>
> /dev/sda:
> APM_level = off
>
> I can understand spindown might be useful on battery, quite dangerous
> on AC.
>
> There used to be an option in "power manager", but not on SL7.4.
>
You may want to set laptop-mode depending on your usage -
https://www.kernel.org/doc/Documentation/laptops/laptop-mode.txt
--
Pat Riehecky
Fermi National Accelerator Laboratory
www.fnal.gov
www.scientificlinux.org
