Currently running two 3000W (110V) power supplies in our 6509 chassis's. I have ordered two new 4000W (can only find them in 220V) power supplies. The power supplies are running in redundant mode.

I know upgrading the power supplies isn't supposed to effect the uptime of the chassis/blades, but is it ok when doing the upgrade to have one power supply as 110V and one as 220V? I will be replacing both power supplies, but there will be a short time (few minutes) where the voltage doesn't match.

Issues with this and does anyone have experience with this?