[jtwrace]

This is just because I'm curious.  Can anyone explain to me how the Dell Server power redunacncy works?  There are two power supplies plugged in to one unit.  If one fails does the other takes over or are they both outputing power at the same time?  The units are UL approved but I'm curious to know how this is done. 

Anyone?

[Bizarroterl]

It depends on their design, but if one fails the other fully takes over the load.  It is (or at least should be) totally transparent to you.  No reboot/glitches should occur.  In a typical data center situation there's some type of monitoring software installed so you're notified when this occurs (email, text, or page).

It's easy to test.  Just unplug one of the power cords. 

You can further protect uptime by running each power cord to a different UPS.  That way if a UPS fails your systems still stay up.

[jtwrace]

It depends on their design, but if one fails the other fully takes over the load.  It is (or at least should be) totally transparent to you.  No reboot/glitches should occur.  In a typical data center situation there's some type of monitoring software installed so you're notified when this occurs (email, text, or page).

It's easy to test.  Just unplug one of the power cords. 

You can further protect uptime by running each power cord to a different UPS.  That way if a UPS fails your systems still stay up.

Yeah, I know what it does but I'm curious to know how it works exactly.  Both power supplies put out equal power at the same time or does it detect a loss on one then the other kicks on to full power out.  That's what I'm asking....