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.
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).
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.
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
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