On Thu, Apr 26, 2012 at 8:44 AM, Xavier Carcelle <xavier.carce...@gmail.com> wrote: > Dear XS folks, > > to follow-up on the hardware threads, I have tried to sum-up some > reflexions about the hardware possible to build up the XS/book-server > @ our deployment in NosyKomba (Madagascar) > > =Energy > The electricity is produced w/ solar panel (2 x 230W) producing a 24V-DC > network > => we need to supply the maximum of devices/appliances in 12V/24V-DC > to maximize the usage of the electricity > =>A 12v-DC network is preferred because most computers/network devices > power-supply are in the range 9-17V-DC (ATX power supply are producing > 12V/5V/3V3/-12V from 110/220V-AC or 12v-DC) > =>APC solutions with monitoring of the battery load interacting with > the XS over Ethernet link could help to shutdown/halt properly the > linux kernel in case of power outages > ==>I am looking at how can i stop smoothly the services while powered > by 12V-DC and some batteries/regulators ?
Yep, we need to monitor our battery load, depending on the hardware we could have the power info. I don't know about the FITPC, but we could set up something quickly. Or we use an analog input in relation with our electrical power, define a range in which we should poweroff the board… The best should be to have a small device, idle quite all the time, sending a shutdown ip frame to the board when the load is critical (too low or too high?) > > =School server (separated or merged XS and Book-server) > > There is several propositions of hardware : > > =>reliable (PC-like solutions) > *Advantech ARK-3440 (w/ tropicalized hard drives in RAID6) supplied in > 24V-DC (usually 180W - ATX) (~= 1000€) > *MSI WindBox DE500-5123 (newegg.com) - 169€ > *MSI 6676-001BUS (amazon.com) + 4gb DDR2-800 200pin notebook form > (CORSAIR 4GB (2 x 2GB) 200-Pin DDR2 800 at $45 and 2TB SATA hard drive > (Samsung) at $80 > *fitPC2 : http://www.fit-pc.com/web/fit-pc/fit-pc2-specifications/ + ssd hdd > *fitPC3 > > =>low energy : > *Sheeva or dream "plug" supplied in 12/24V-DC (ARM-based CPU) > *flash/hard drives storage (ARM architecture) and connected in > Ethernet/Wi-Fi (usually 10W) > > =>experimental : RasperriPi (less than 5W) > > =>ARM based : > *XO 1.75 (? W) as a XS server with a usb-to-ethernet adapter for wired > connexion to the lan > *OpenWRT devices w/ external storage (foneras, wrt54g, ...) > _______________________________________________ > Server-devel mailing list > Server-devel@lists.laptop.org > http://lists.laptop.org/listinfo/server-devel -- Kévin Raymond (shaiton) GPG-Key: A5BCB3A2 _______________________________________________ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
