I have seen a number of questions from the field regarding power supplies for the c7000 and what do you need to maintain for correct Onboard Administrator functions. Let's take a look at this inquiry:
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Ordered a new HP chassis, as part of this order, we ordered some additional power supplies and fans for an existing chassis. For some reason, we are getting an error message about the new power supplies.
The chassis OA is complaining the power supplies are not matching. In the OA, Is says that mixing different power supply models is not supported and that all power supplies in an enclosure must be the same part number.
The previous power supplies are
Model: HP 2400W HE PSU
The new power supplies are
Model: 2400W 80 Plus Platinum
According to Quick Specs >> NOTE: Mixing of power supplies in the same enclosure is Not SUPPORTED. All power supplies must be of the same type. All HP 2400W HE, all HP2250W or all -48V DC.
These are both 2400W HE – shouldn’t it be supported? Why does it have to be the same part number?
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Kurt provided what we all need to know:
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We have two different versions of the 2400 watt power supply – the 92% efficient HE PSU (introduced in March 2009), and the 94% efficient 80 Plus Platinum PSU (introduced in June 2010, CTO only). Each of the different power supplies we have in the c7000 has a different architecture, and therefore, their methods of current sharing are not compatible. When supplies are mixed, the supplies could be providing unequal amount of power into the system, which could stress the ones providing the majority of current. Also, the OA will not be able to calculate the power output of each supply properly, so the power reporting will be incorrect. This is why all the supplies must be of the same type inside a chassis.
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So keep this in mind when you are looking for replacements, spares, or new systems. And take a look at the Onboard Administrator Guide: http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00705292/c00705292.pdf
