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10.3: Take advantage of built-in UPS functionality
Authored by: kq7b on Feb 13, '05 06:20:20PM

Yes, it passes my simple "pull the plug" test using OS/X 10.3.8 on my dual 2.0 gHz Powermac with an APC XS 1000 UPS. Here's what happened:

1. I had previously configured the UPS status display on the menu bar to show "percentage" and "Shutdown when only" 10 "minutes of UPS power are remaining."

2. I quiesced the system (quitting all my aps, waiting and manually syncing my mirrored disks).

3. After about 4 hours of charging, I pulled the UPS plug.

4. The UPS alarm sounded and OS/X displayed a dialog that warned me that the system was operating from battery power. The lighening bolt in the UPS battery icon was replaced by a solid bar.

5. The UPS icon's "percentage" indicator began to drop rapidly from 100%, getting down to 92% in a matter of a few minutes (given only 4 hours of charging). The dual G5 sucks the life out of a 1000VA UPS.

6. I plugged the UPS back in. The noisy UPS alarm quit sounding and the OS/X dialog disappeared from my screen. The UPS battery indicator began to climb back towards 100%.

Pretty cool. We owe someone at Apple a fine, "Job well-done." It works mostly like a Powerbook loosing its AC power except that various alarms go off to warn us that we're on battery power. But you aint seen bad battery life until you've seen a dual 2.0 G5 (two 160 mb mirrored drives and 2 gb of RAM) run on batteries! I haven't seen anything go down quite so fast since 1000HP quit in the front of a floatplane in the arctic (there is, BTW, no better sound in the world than your airplane engine starting back-up again).

Thanks again for the great tip.



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