On Jul 19, 2013 10:04 PM, "Darr247" darr247@gmail.com wrote:
On 2013-07-19 1:01 PM, John R Pierce wrote:
On 7/19/2013 5:51 AM, Darr247 wrote:
On 2013-07-19 3:54 AM, Gordon Messmer wrote:
Regardless of your storage, your system should be powered by a monitored UPS. Verify that it works, and the drive's cache shouldn't be a major concern.
It should also be a 'true sine wave' output when running on battery. Many UPS units output a 'stepped approximation' (typically pulse width modulation), which some computer power supplies may not like.
virtually all PC and server power supplies now days are 'switchers', and could care less what the input wave form looks like. they full wave rectify the input voltage to DC, then chop it at 200Khz or so and run it through a toroidal transformer to generate the various DC voltages.
Heh... go ahead and use stepped approximation UPS's then. What do I know; I'm just a dumb electrician.
I just trust Florida Flicker n Flash - never had outages.... more than once a day!
Sorry could not resist.......
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