Jerry Geis wrote:

I am using centos 5.1. I want to keep my machines always powered on. Some machines (important ones) are UPS'd.

I have also set in the BIOS (gigabyte motherboard) the power options that after power loss should do a full on.

The other day we had just a momentary power drop. the UPS machines had no issue of course with that.

However, the other machines did not come back on.

Is there anything additional in Centos that can help ensure this machines turn back on. Perhaps something in acpi stuff? Does that need setup?

Thanks for the discussion.

Jerry

No.

If a PC is powered off, the OS (regardless of which OS), won't be able todo anything about it, since an OS is loaded after the PC's BIOS & POST. The only way around this, is setup something like nagios on another server (you could have a few servers running with Nagios, monitoring each other), which can then send a WOL (Wake On Lan) signal to the PC's that have switched off.

Some more expensive UPS's have a function to turn PC's on when they're on