On 06/28/2014 12:28 AM, Dave Taht wrote: > Pretty sure (haven't booted it yet) the parallella (which is smaller > than a drive), > can do it in under a 2 watt, and if it doesn't do gigE now, it'll do > it after I get through > with it - but it lacks a sata port, and usb is only 2.0, so it might > not drive gigE > from a nas perspective. (It kind of bugs me that most of the tiny boards are > in > the altoids form factor, rather than the 2.5 inch drive form factor) > > So I go back to my original point in that, once you have fiber to the > business, > for most purposes in a small business or startup or home - who needs > to co-lo in a data center? > You can have a tiny wart on the wall do most of the job. And that's > today. In another > year or so we'll be over some more tipping points. > > One thing that does bug me is most UPSes are optimized to deliver a large > load over a short time, a UPS capable of driving 5 watts for, say, 3 days is > kind of rare. >
I think this is something that's in need of a new approach/disruption. For low power devices like NUCs and RasPi servers, running them off of a traditional UPS is hugely waste-full, since you're going from your Line voltage (120VAC or 240VAC in many places) to 12 or 24VDC (Or 48VDC for a bigger UPS). Then when the UPS has to kick in, it converts the battery voltage back to your line voltage. A better approach would be to have a UPS that had a good intelligent charger for your deep-cycle type battery that coming off the battery, you kept it at the correct DC level for your NUC or Raspi. Which for many of these devices is 5 or 12VDC. So in a sense, it becomes your low-power device's power suppy, it just happens to have the added benefit of having a built-in backup battery. Coming from a Ham Radio perspective, some hams run their base stations off of deep-cycle marine batteries with some form of charger keeping them topped off. This way, the radio operator can operate his or her station for days just on emergency power. Since a lot of ham gear is designed to operate off of 12VDC (with some notable exceptions like your high-power amplifiers). It shouldn't be hard to develop a decent grade Low-power UPS for home or small office use that can run these low power devices for days at a time with out all the inefficiencies of converting VAC to VDC and back again. And there's probably a bunch of Raspi (or similar low-power computer boards) enthusiasts who already have for their own personal use. - Joseph Swick _______________________________________________ Cerowrt-devel mailing list [email protected] https://lists.bufferbloat.net/listinfo/cerowrt-devel
