Re: IBM i Hosting

Hello Jim,

Am 04.04.2020 um 22:12 schrieb Jim Oberholtzer <midrangel@xxxxxxxxxxxxxxxxx>:

The system uses quite a bit more power on startup (just listen to it) then settles to far less once it’s running, say 5 minutes.

Did you actually measure that? The fans of servers usually blow full speed for thermal calibration while hardware is checked. It's not a cooling requirement. And even the whole lot of fans usually draws around 200mA each when blowing full speed. Times 12V equals 2.4W for each fan. When running half speed, they might reduce to around 0.8W.

The E4A wasn't making much of a deviation from 400W while powering up or IPLing, or sitting idle, afterwards.

Yes SSDs use less power, but they are more expensive to buy and maintain.

What exactly are you referring to in terms of expensive maintenance?

Drive don’t add that must on start up except when they spin up, then settle to normal quickly.

With 2.5"-drives, the difference is negligible. With 3.5"-drives, they draw about 50% more when spinning up (around 10 seconds). Not that much more, considering the spin-up time. I'd say, it doesn't really matter, because you save more power by not letting the box run overnight, for example.

I still have some Seagate Elite 9GB Disks. 5.25", full-height (two times optical drive) which draw around 25W when idle and go up to 40W when "switching to gear two" to bring them to the nominal 5400 RPM. Very impressive. :-)

:wq! PoC

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