didn't someone tell me that telco equipment had 40vdc racks once?

[Jonathan Hutchins]

On Friday 21 December 2007 14:00:02 Brian Kelsay wrote:
> Unless those DC rack supplies are ten times more expensive to replace and
> more likely to fail than a server power supply and harder to find.

In which case, the claims they make on their web site and in their ads are 
fraudulent and illegal!  Quick, call Luke Jr!

On Friday 21 December 2007 14:09:06 Billy Crook wrote:

> Another consideration is that this would effectively put 42 machines
> on the same 12v rail, and the same 5v and so on.  So if a component in
> one machine failed in such a way that it shorted across that rail, it
> would take all devices on the rail down unless they each had
> individual load breakers for each rail.  

You don't suppose this occurred to them?

Seriously, guys, have a look at the web site and see if maybe they've 
addressed your speculation before you raise objections that they've already 
covered.

These things are real, they've been selling for several years, and they're not 
a myth or a rube goldberg contraption.  The company has numbers that say they 
save significant operating costs, so they must be doing something right.

Not having priced them, not having an operating budget that includes power, 
cooling, and maintenance for a site, I don't know if they save enough to pay 
for the hardware.

The _ONE_ objection I see is if you buy their system, you're locked in to 
buying replacements and upgrades from them, since there isn't a standard - 
yet.  Having delivered enough very expensive RAID cards that became 
unavailable within the MBTF for the cards, that would be a major objection 
for me.