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On Sat, Nov 15, 2014 at 8:54 AM, Bruce Schultz <brulzki@×××××.com> wrote: |
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> |
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> If the UPS battery has not run flat before the mains power is restored, I |
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> see no reason why a UPS should kill the output power. So the BIOS has no |
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> real way of knowing that it should reboot again in that case. |
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> |
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Obviously not directly applicable, but I use nut and a cyberpower UPS |
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and the shutdown scheme it employs is that the master (controls the |
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UPS) commands everything else to shut down, then it begins shutdown, |
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and just before powering off it sends a command to the UPS which |
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causes a several second delay followed by a power off, and then it |
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powers off the host (which is otherwise shutdown already). |
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I need to re-read how exactly this is implemented. |
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-- |
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Rich |
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