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

[Tony Anderson]

Hi,

What is the disk capacity required by internet-in-a-box?

The purpose of the server is to deliver the information not available 
from the internet.

The cost of a UPS which is required for a system on the grid is $80-100.

In my experience, there is need for one school server at a school 
supporting 30-200 XOs.

Tony

On 08/17/2013 03:02 AM, server-devel-request at lists.laptop.org wrote:
>>The average difference between power consumption of an SSD and a HDD is
>>about 4W. [1][2]
>>
>>Now considering the environments we're gonna head into we're looking at
>>typically 1-3 days of power backup for the server (lets average out at 2).
>>
>>That means, the battery backup needed is:
>>4 * 24 * 2 = 192 W-hr
>>
>>*That comes out to roughly $25-35 in battery costs*  (again based on quick
>>google searches for battery costs). *If you want a longer life from
>>you're battery, you're looking at about $50-60 in battery costs.*
>>
>>Now if we're also giving solar backup, based on the calculator here
>>[3] we're going to need about a 25-30W solar panel (for just those 4 extra
>>watts). Again, google tells me that *such panels retail for about $65-80.*
>>*
>>*
>>*So, on average we'll save $100-$130 on TCO (total cost of ownership), if
>>we intend to provide an SSD as opposed to an HDD, considering the server
>>runs 24x7 and 2 days of backup is needed.*
>>*
>>*
>>On top of that, you're looking at less failures, a better operating
>>temperature range, and more durability.