![]() ![]() hit them with a wake-on-lan packet and they reboot from complete power off. Now all the remote machines are off, and won't ever see their power cut off, and then recover, so they don't turn back on. If the power comes back on AFTER the remote machines are shut down, but before the linux box turns off, the linux box sees power recovery, and the UPS never shuts off it's protected outlets. All the machines see power come back on, and are set to reboot. On power recovery, the UPS waits until it's batteries are sufficiently recharged, and turns back on, powering up it's protected outlets. When all remote machines are off, the linux machine shuts off, and the UPS powers off it's outlets. During a power failure, that linux box will connect to ever other machine on the network sharing this UPS and tell them to SHUT OFF, not sleep, because hard power failure is emminent. There is a linux server which actually communicates with the UPS. I have my Mac on a large shared UPS with serveral other computers and network gear, etc. This is not difficult to do, as every $200 PC on the market w/ WOL does it. I have no problem powering up my Mac from sleep, but it won't turn on from power off (like every PC I've tried). It appears that Mac's don't provide wake on lan from complete power off.
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