My understanding has always been that the specs listed for the DAE were assuming a fully populated (worst case) situation. That is how we have configured and we haven't run into any issues.

That's what I thought, but what about the new low power 1TB 5k4 thingies ? I need to mention some number to the customer stating that he will indeed use up less power.... And when you look at the individual drives, there's no way I end up with 425W by multiplying the most power hungry drive by 15. So I assume the DAE itself is very power hungry itself as well.

Allen is right - the power spec mentioned in the specification is considering a fully populated enclosure with maximum consumption possible. Also note that, its not only the disks in the DAE but other components like Cooling Fans which require power as well.

My 2 cents
Cheers,
Sandip

True - EMC Power Calculator is much helpful not only for CLARiiON but for all EMC hardware, but as you rightly mentioned it is not available to customers yet (as I know) - thus I have not mentioned it earlier. But thanks for mentioning it.

That internal power calculator is excellent. It shows you the power draw for each type of drive, typical, and maximum draw. I had to have EMC run it for my configuration because my fully populated rack was cabled from the factory using four PDUs with L6-30 plugs on them. I only had power for two circuits, so I needed to make sure that it would work with only two. Thankfully it was approved.

In general, the faster the drive spins, the more power it requires. EMC uses multiple brands of disk, so each part number has a different power rating. One way that EMC is trying to sell the flash drives in the Symmetrix (and now CX4) is the $/IO and power/IO. You need 30 15k spindles to equal one flash drive, so you save on power, space and cooling all at once. Those 15k drives suck a lot of juice.

All, I tried the power calc and I must say: I'm impressed. I ran it last year, but somehow I ran into trouble and had to ask our account manager to produce some figures (which he did). Today's version runs great ! Thanks !

PS I'm a partner, so I can download it

Thanks for your feedback Rob - I am sure our engineers in the corporate will be pleased and happy to see this feedback

By the way you could access is as you are partner, but it is not available for customers.

Thanks,
Sandip

I forgot to mention shewitt's name - thanks for the great feedback on this tool "shewitt".

I still would like to have Avamar put into the calculator as well.