On Fri, May 23, 2008 at 11:51:30AM +0100, [EMAIL PROTECTED] wrote: > Hi, > > > We running different power supplies on one of our 6509 for years, > > no problems with that configuration: > > yes, you just need to be very careful that your blades dont > draw too much power for the one not in use. eg if you are currently > on a 2500W supply...and that fails , leaving you with only > a 1300W then your blades may take too much for that and thus some > will fail.
Yes, I should note that this system is old one, Sup2 based, with old fans, using only 584.22 Watts, so even when we lose AC power - 1300Watt DC power supply provides enough power to run. > eg in the scenario posted... > > > Switch#show power > > system power redundancy mode = redundant > > system power total = 2331.00 Watts (55.50 Amps @ 42V) > > system power used = 584.22 Watts (13.91 Amps @ 42V) > > system power available = 1746.78 Watts (41.59 Amps @ 42V) > > so, system thinks its got 1746 available.... and 2331 supplied.. > however: > > > PS Type Watts A @42V Status Status State > > ---- ------------------ ------- ------ ------ ------ ----- > > 1 WS-CDC-1300W 1153.32 27.46 OK OK on > > 2 WS-CAC-2500W 2331.00 55.50 OK OK on > > that 1300W wont provide enough if the power used was eg 1341.55 Watts > as the system THINKS its got 2500.... _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
