Running a bunch of CentOS servers on 2U supermicro equipment, usually with 8 drives on Adaptec SmartRAID V or LSI Megaraid.
In designing a rack in a data center, the question arises as to how to measure the amperage the server uses, prior to investing in power drops that actually do that for you, even remotely, for about $260.00-300USD per unit. This number is the important one these days in determining rack/datacenter design.
So the geek question is, "what do you use, from radio shack, or elsewhere, to accomplish this one time measurement *before* you implement a design"?
Easy. Get any modern UPS that will talk to your OS (or the OS on another nearby computer), plug in a server, and look at the UPS display. All the UPSs I have used lately will tell you what the load they are providing is, either is watts or in amps.
Ted Miller Elkhart, IN Centos NewNewbie