Comment 12 volt bad. Also, I don't think it's broke... (Score 1) 237
12 volts is horrid. Really. I have a friend that works in the car audio 'boom boom' industry and he really laments 12 volts. He has to run 0 gauge wire for items that bolt onto a fold down back seat of an SUV... how big a bus bar will we need for a full rack of 12 volt junk?
The limiting safety factor on voltage is breakdown of insulation. The limiting safety factor on current is wire diameter (and to a lesser extent, length). We've converted a good deal of our AC to 240 just to increase wattage capacity. Don't go the wrong way guys.
Also, if you are redefining racks:
23" already exists.
If you must make a new size, make it metric. Also make the rack units metric. And saying 1RU = 2.54 cm is not making it metric.
If you are standardizing everything else, come up with one (not neccessarily new) standard for 'how things are connected to the rack' (one thread, one style hole, one style thing to adapt thread to hole) so I don't have a drawer full of 18 different types of hardware for the things. (ok is this rack 8-32 or 10-32 or 12-24 or M5 or M6. Oh wait the rack kit wants square holes so I need to put this server over in that rack instead... but the nas array wants round unthreaded holes so it has to go across the room)