[Server-devel] Server Hardware.

[David Farning]

Agreed lets call it:
Tolerant 12V input.

In this information gather phase, I am targeting manufacturers who
specialize in automotive and industrial controllers. These folk seem
to grok the environmental constraints of School Servers better than
traditional server manufacturers who are used to climate controlled
equipment rooms :)

On Fri, Jun 21, 2013 at 2:40 AM, David Leeming
<david at leeming-consulting.com> wrote:
> DC power input should be 12V and quite tolerant, say 9V - 15V. We have used
> two types of fanless e-box; the first needed a 5V DC input and there were a
> few embarrassing mistakes, as we were using mainly 12V supplies (solar). The
> 15V upper limit is needed as many solar power systems do not have voltage
> regulation - only charge regulation. The load voltage floats with the
> batteries, commonly to about 14.5V so the device needs to be able to handle
> that and shed any heat generated even in hot climates, humid and still air.
>
> David Leeming
> Solomon Islands
>
> -----Original Message-----
> From: server-devel-bounces at lists.laptop.org
> [mailto:server-devel-bounces at lists.laptop.org] On Behalf Of David Farning
> Sent: Friday, 21 June 2013 2:22 a.m.
> To: server-devel
> Subject: [Server-devel] Server Hardware.
>
> Over the past few months, a number of hardware vendors have expressed
> interest in providing server hardware for the XSCE project.
>
> After working with several deployments, talking to several of you
> personally, and reviewing the information on the lists I have a set a
> couple of priorities:
>
> General --
> 0. POTS -- To keep development cost low, the hardware should be
> available Plain Off The Shelf.
> 1. Self contained -- The most important requirement is that the server
> is self contained in a single box. No dongles or external USB devices.
> 2. Rugged -- No fans or moving part. Metal case which serves as a heat
> sink is preferable.
> 3. Low power -- Power consumption is critical in many deployment situations.
> 4. 2-3X price of laptop -- This seems to be a generally accepted price
> for a school server.
> 5. ?
>
> Specifics --
> 1. Internal harddrive -- Offline content, caching, and backup space is
> needed.
> 2. Expandable memory -- In many situations the server memory is the
> constraint for handling more users 1GB to 4GB?
> 3. Dual ethernet connectors -- In many situations the school server
> acts as a gateway between classroom LAN and the internet WAN.
> 4. USB ports -- The ability to connect USB devices is critical.
> 5. ?
>
> Would be cool --
> 1. Internal battery -- ...
> 2. Any other thoughts?
>
> --
> David Farning
> Activity Central: http://www.activitycentral.com
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>
>



-- 
David Farning
Activity Central: http://www.activitycentral.com