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 > > Tony > > On 08/17/2013 03:02 AM, server-devel-requ...@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. > > _______________________________________________ > Server-devel mailing list > Server-devel@lists.laptop.org > http://lists.laptop.org/listinfo/server-devel _______________________________________________ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel