On 9/30/2014 3:42 PM, Leon Fauster wrote: > Am 30.09.2014 um 19:08 schriebm.roth at 5-cent.us: >> >Leon Fauster wrote: >>> >>I would like to setup a small system based on CentOS6 >>> >>"power outage"-save as possible. The hardware will be >>> >>switch off by pulling the plug. >>> >> >>> >>To accomplishing this goal, I would mounting some fs parts >>> >>readonly (e.g. /usr) and thinking about tmpfs for volatile >>> >>parts (e.g. lock, run under var). Additionally "optimize" >>> >>some vm.dirty_* kernel- and fs/ext4 parameters. /persistent >>> >>would be used with jffs2 on a CF card. So far the theory. >>> >> >>> >>Does anyone have some experience with such type of systems? >>> >>Any pointer to pitfalls are welcome. >>> >> >> >Put it on a UPS, and install apcupsd. > Sure, for servers but I am talking about a small > 9W-power-consumption appliance that have this > requirement:-) I don't think CentOS is the appropriate distribution for that sort of system. Does it even have jffs2 support? a uClinux/busybox based system would be much more appropriate. maybe start with DSL, http://www.damnsmalllinux.org/ or tinycore, http://tinycorelinux.net/ -- john r pierce 37N 122W somewhere on the middle of the left coast