If I had 2 UPS's and each one is plugged into a seperate redundent power supply on the server and the power goes out, is there a way to make ups 1 kick in and ups 2 to not do anything and only start supplying power if ups 1 starts to get low?
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setting up server to initiate ups 2 when ups 1 is running low
- Thread starter cyr0n_k0r
- Start date
you probably would have better luck just chaining the batteries together. (or, now that I think of it, maybe even the ups's themselves)
If you do a switch between two, the power will fluxuate too much for the system to handle, and it will reboot.
If you do a switch between two, the power will fluxuate too much for the system to handle, and it will reboot.
SJConsultant
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In my expierence, server sysems with redundant power supplies also perform load balancing.
IOW, if your server pulls 6 Amps of power total, then it would split 3 amps between the two PSUs, if you were to disconnect one PSU, the 3 amp load shifts to the working PSU causing the remaining PSU to pull 6 amps.
Simply plug each PSU into seperate UPSs and be done, It will have the net effect you are seeking.
IOW, if your server pulls 6 Amps of power total, then it would split 3 amps between the two PSUs, if you were to disconnect one PSU, the 3 amp load shifts to the working PSU causing the remaining PSU to pull 6 amps.
Simply plug each PSU into seperate UPSs and be done, It will have the net effect you are seeking.
SJConsultant said:In my expierence, server sysems with redundant power supplies also perform load balancing.
*SOME* support this, not all. I forget the term off hand but it is something like power sharing or something to the effect that they share the power. A lot of the cheaper redundant power supplies simply work as a cold spare so it will not power on unless the other fails.
I agree with the person above that just chaining them together is probably the cheapest option, though I have never tried it.
cyr0n_k0r said:the server in question is a dell poweredge 2500
it would have at least 2 redundent.. possibly 3 power supply's.
Why not just chain your UPS's together?
-Michael
SJConsultant
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cyr0n_k0r said:the server in question is a dell poweredge 2500
it would have at least 2 redundent.. possibly 3 power supply's.
Dell PE2500's are load balanced power supplies. Connect one UPS unit to each PSU.