snarlydwarf;566327 Wrote: > Wrong: I've seen machines fail to come back due to power loss. > When a car runs into a telephone pole, you do not get a clean shutdown > at the OS level When a car hits a pole, all unsaved data is lost. Everything else is intact.
Wrong in spades are the most naive who *know* only using observation. Also called junk science reasoning. A naive observer will be quick to blame power loss when his own technical ignorance was a most common reason for failure. In another example, the computer powered off suddenly. Well he blamed power off for the damage. He did junk science. He observed - that was knowledge. We did the autopsy. A pullup resistor to bootstrap the power supply controller had failed to due too many hours of continuous operation - a manufacturing defect. That resistor failed probably months earlier. Then when power was lost, the computer would not boot. Observation: power went off. Computer would not boot. Therefore that *proves* power loss causes damage. Science and reality: A manufacturing defect a month earlier created a failure only detectable after any power off. When does a disk drive learn that computer power is going off? When the 5 and 12 volts suddenly starts dropping. Again, those who do not first learn the science - who know only from observation - would not know that. A disk drive is never warned that power is being removed. All power offs ( shutdown, yank the power cord, car hitting a pole, entire state blackout) appear as the same power off to all disk drives. A reality that was true even when heads were moved by motor oil. Those educated only from hearsay - who only know from observation - would never know that. Those educated by observation immediately know unexpected power off causes damage. Amazing how observation alone becomes knowledge. Just like Windows, a power off do to any reason must not harm any Linux hardware. UPS has only one function - time to protect unsaved data. That Liux machine is equally fine with or without a UPS. Greater threats to that hardware are solve elsewhere - not by a UPS. Also requires knowledge not obtained from observation and hearsay. Linux is just as robust as Windows as are all other computers today. Linux has the same Windows features that make all power offs irrelevant. -- westom ------------------------------------------------------------------------ westom's Profile: http://forums.slimdevices.com/member.php?userid=39650 View this thread: http://forums.slimdevices.com/showthread.php?t=80889
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