[Server-devel] Server-devel Digest, Vol 76, Issue 21

[Jerry Vonau]

On Sat, 2013-08-17 at 07:40 +0200, Tony Anderson wrote:
> Hi,
> 
> My point about the UPS is that an off-grid setup doesn't need one which
> somewhat offsets the additional cost of supporting a hard drive.

Yea the cost savings can go towards a proper 12v deep cycle battery. 

> Currently the two schools in Lesotho are using MSI Nettop as school 
> servers. In the context of charging 30-100 XOs, the additional power 
> consumed by the school server is negligible.
> 
> However, at the second school which charges the laptops using individual 
> solar panels, the school server takes a dedicated solar panel charging a 
> pair of car batteries.
> 
> The big surprise was that the MSI does not boot on 12vdc. This required
> adding an inverter (designed to charge laptops from a car battery).
> 

Good to know, thanks.

> I was hoping the Trim-Slice H would be suitable. I am concerned with its 
> fixed 1GB memory. The Utilite looked like a promising alternative, but 
> supports only SSD. We may have to wait for nettops based on the new
> Atom technology for a one-box solution. In the meantime, the current 
> Atom based systems are doable in an off-grid deployment.
> 
> By the way, the need for the school server is closer to 50 hours per 
> week than 24/7. Normally it needs to be booted only during the hours 
> when children are in school.
> 

Valid point, that should be taken into account when calculating total
power requirements.

Jerry

> Tony
> 
> On 08/17/2013 06:21 AM, Jerry Vonau wrote:
> > On Sat, 2013-08-17 at 05:49 +0200, Tony Anderson wrote:
> >> >Hi,
> >> >
> >> >What is the disk capacity required by internet-in-a-box?
> >> >
> > 600-700 gigs
> >
> >> >The purpose of the server is to deliver the information not available
> >> >from the internet.
> >> >
> > Yup, or when your offline.
> >
> >> >The cost of a UPS which is required for a system on the grid is $80-100.
> >> >
> > Think the issue is mainly about off-grid systems, those are usually 12v.
> > What would be neat is if there was a power supply that you could replace
> > in your standard PC that used 12v as the supply voltage. Anybody know of
> > a manufacture that supplies one? I'd hate to see what the size of the
> > battery pack and the recharging requirements needed of the
> > solar/wind/<insert others> recharging system that would be needed to run
> > such a beast.
> >
> >> >In my experience, there is need for one school server at a school
> >> >supporting 30-200 XOs.
> > Know of any low power devices that you might recommend for off-grid use?
> >
> > Jerry
> >
>