PCER

Hello and thanks. Yes, thats 415V of course, 3 phase. If a 42U rack cannot actually hold all the equipment, why are such tall racks available? Assuming that there is cooling in the computer room and/or warm aisle or cold aisle cooling, how much could actually be put in to the 42U rack? The 1,500 W is at full load anyway so the calculation allows for max power which there probably would not be. The servers using 1,500W are for virtualisation and have 256GB SDRAM which could allow for quite a few users if each has a guaranteed part of the SDRAM of less than 1,000MB each. A main thing is that one rack takes up the space of one rack so why leave part empty and then get a second rack taking up more space and yet again leave it part empty?

A Windows virtualisation platform or a linux virtualisation platform allowing for virtual OS systems. How much of the SDRAM would the virtualisation platform take up initially?

Good evening. What amount of an SDRAM is taken by the software? For example, a 256GB FBD 667Mhz SDRAM running Windows virtualisation has what amount of the SDRAM left for the virtualised OSs?

Yes. What to put in? The Dell R900 is 4U and takes up to approx. 1500W. A PDU is 2U and powers 3 servers up to 60A. A 42U rack could hold 8 R900s, 3 2u PDUs, and a KVM, leaving 3U. I assume the UPS is situated elsewhere and covers the entire power supply. At 230V single phase, each PDU needs to deliver 55A for the R900s at full power, which is right with the PDUs at up to 60A. Cheers for reading.

Thank you for replying, I have thanked each of you. The 42U rack would have in it as much as the 240V supply could handle! So that would be servers, a PDU, and whatever else would be needed, a 1U keyboard, any cooling? Someone says he has a 315V supply so the rack could be powered there if that's right. If there was 32 amps for the 42U rack, does it follow that 64 amps would be required if there was then another rack added to the same supply later?

Good morning. Can anyone confirm some power requirements? Working backwards from a 42U rack, what would it need to contain to be full, and what power would it use? A rack seems to need a 16 amp supply but my power supply is in Watts and at 240 volts. Thx.