I'm working on coordinating a rack with 1 HP Proliant DL580 G5 and 2 Proliant DL380 G4's. Is it possible to induce either of these units into something like a standby mode?
I've perused the manuals for these systems, and have so far found nothing. Each of these things chews up an obscene amount of power, since they contain a total of 40 Xeons between them, and they take several minutes each to start up. These servers don't need to run constantly, but they need to be available for computation at essentially any time- is there any solution available to reduce their power consumption, without incurring more than about a minute of delay?
In case it's relevant, the DL580 is set up with Ubuntu server, the DL380's with ESXi - both of those can be changed if necessary, however.