Proliant server input power voltage

[Chris Gustin]

We are converting several racks in our server room from 110V to 220V, and would like to keep the servers up during the process. Is it okay to have the servers running on two different voltages simultaneously? I suspect it is, but would like to hear from someone who has actually done this. The models in the racks are: 3000, 5500, ML350-G3, ML370-G1, ML370-G3, ML570-G1, DL380-G1, DL380-G2, DL380-G3, DL380-G4. Thanks!

[Steven Clementi]

Chris:

Since technically the power supplies are independant of each other, for the most part... I think they can handle the mix until you can more them all onto 220. I would not leave them mixed for longer than the few minutes it should take to make the swap.

I would be very cautious though. I would rather take some downtime rather than mix voltages. The downtime would be minimum, enough to reboot the box and a few extra minutes for the swap.


Steven

[Chris Gustin]

Thanks for the response Steven. I just got an email from HP saying that it's not a supported configuration and isn't recommended. Uggghhh . . . we're a hospital, and it's a huge deal to down servers, even briefly. Oh well, we gotta do what we gotta do.

[Oleg Koroz]

Take one less critical server and try,
Steven is right Power Supply is standalone unit and output from PSU to system board is same and not depend from 110 v or 220 V

[Chris Gustin]

We had proposed that, but we only have spares for a few models. I read somewhere else in this forum that somebody has some Proliant servers running continuously on different voltages. They didn't say which models they are, though.

[Chris Gustin]

I was wondering whether the different current draws would make a difference too.

[Steven Clementi · Accepted solution]

It shouldn't...

The Power Supply is making the current draw, not the server. The P/S is also continiously supplying the needed transformed voltage/current. +/-12VDC, +/-5VDC and 2 to 4AMPS.

The power supply will always supply the same voltage/current no matter the input. Slight variations are to be expected...but really slight.


Steven