Dual rackmountable power supply?

Fri Apr 22 22:52:54 UTC 2005

Without 1-1 transformer and complex switching circuitry you really can't 
do safe switching from one to the other. That pretty much means any such 
device would be just as complex or more so as UPS, but less safe. So I 
think your best bet is to decide if your power problems last long and if 
they dont last more then several minutes and then just use regular UPS or 
if its bigger problem, then use UPS that can accept redundant power sources.

For servers with redundant power supply its quite different because they 
do provide power to the board from multiple sources and each one is 
already DC so its not a problem to switch quickly then.

On Fri, 22 Apr 2005, Mike Sawicki wrote:

> Do any of you know if there are companies who manufacture 1/2U
> rackmountable PDU's that take AC from redundant sources?  I have
> equipment at a colo that seems to have issues with one of the two
> circuits in my cabinets about once a month.  Since it would be a
> real pain in the neck for me to retrofit every server with dual-ps,
> I was thinking this could be a possible middle-of-the-road solution.
> Thanks.
> --
> Mike Sawicki (fifi at HAX.ORG)