On 28.11.2022 11:18, James Johnson wrote:
> Thanks a lot for all the great advice, that is very useful. It all
> makes sense.
>
And if you really need low consumption, rugged computer and do not mind
about the costs you can go eg. this way :-)
https://teguar.com/ip67-box-pc-twb-2945/
>> On 27 Nov 2022, at 21:10, Tomasz Rola <rtomek@ceti.pl> wrote:
>>
>> On Sun, Nov 27, 2022 at 09:37:19AM +0000, James Johnson wrote:
>>> Hi all,
>>>
>>> OpenBSD is amazing. But I need help in configuring it correctly as a
>>> remote server, rarely used.
>>>
>>>
>>> The main thing I am trying to do is to make it sleep every now and
>>> then to protect resources. I am very flexible on how to do this, but
>>> have been unable to do so.
>>> Here's what I tried :
>> [...]
>>
>> So to sum up your requirements, you want a self driving box which
>> waits, and once every month or six wakes up, does something, then goes
>> idle again.
>>
>> I would avoid power down/up completely - boot takes time, and fsck
>> takes some more time. Also, AFAIK electronics wears down every time it
>> goes on-off.
>>
>> Modern HDD are said to live to 50000 on-off cycles, so assume 20000
>> cold boots. But random things can happen, because on-off means power
>> spike. If you have no problem with eletricity, I would keep it going
>> all the time. I would however minimise writes. Work on temporary data
>> in ramdisk, write results to disk. Something like this.
>>
>> BIOS battery goes down faster when computer is powered down. When it
>> is up, clock gets power from the wall and saves the battery. I assume
>> the modern CMOS battery will only keep the clock for about a year
>> without power and it will not recharge when you power up. After that
>> time (and before that time, too, but less necessary), every boot
>> should include query to time server and adjusting the hardware clock.
>>
>> I would buy a decent PSU. Last time I wanted to know, Seasonic was the
>> maker of best ones a mortal could buy. Their last unit I bought came
>> with 10 years warranty. AND, according to description, it was built
>> with classic electronic art, analog parts, no digital. So if you are
>> so inclined, you can ask your electronic buddy to inspect it and
>> perhaps even replace some parts with better ones. Or repair it. If
>> microcontroller goes bunk, you are out of luck, I assume they somehow
>> protect their eproms.
>>
>> If you plan to store some long term data on this box, I would avoid
>> SSD. They are fast but they also can go bunk and when they do, chance
>> of recovering data is close to nil (from what I have read).
>>
>> I would consider putting the box in a plastic bag to protect from dust
>> and humidity. Dust will clog into radiators, make chips go hotter,
>> ventillators work harder. I have not tested this, however. I assume
>> thermal exchange with loose bag over the box should go ok, but you
>> need to test it very carefully, monitoring temps all the time - all
>> temps.
>>
>> HTH
>>
>> --
>> Regards,
>> Tomasz Rola
>>
>> --
>> ** A C programmer asked whether computer had Buddha's nature. **
>> ** As the answer, master did "rm -rif" on the programmer's home **
>> ** directory. And then the C programmer became enlightened... **
>> ** **
>> ** Tomasz Rola mailto:tomasz_rola@bigfoot.com **
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