Date: Sat, 21 May 2022 11:14:43 -0500 From: Doug McIntyre <merlyn@geeks.org> To: questions@freebsd.org Subject: Re: OT: Weird Hardware Problem Message-ID: <YokP86/wHwSAgymk@geeks.org> In-Reply-To: <101c1ce69d461c329ce028753fb60a217b7e6906.camel@adminart.net> References: <0a9f810d-7b4b-f4e6-4b7c-716044a9cf69@tundraware.com> <8b13e2f5-6ff4-ecc2-7036-c88cff0f5b6b@tundraware.com> <8732b894-0962-3546-4697-4c2ae0658cb8@kicp.uchicago.edu> <20200520182154.GA87305@neutralgood.org> <4287e288d0655880e1d6bb3598662eeb6a5a30e3.camel@adminart.net> <Yohq1RegvGvWLPiR@geeks.org> <101c1ce69d461c329ce028753fb60a217b7e6906.camel@adminart.net>
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On Sat, May 21, 2022 at 11:52:12AM +0200, hw wrote: > On Fri, 2022-05-20 at 23:30 -0500, Doug McIntyre wrote: > > When you have a datacenter full of devices, you'll see alot more > > failures... > What would you say is the sample size and the rate of failure? > > I've seen only hundreds, not thousands of PSUs. Hmm, over the years? It would be in the range of thousands of machines (less than tens of thousands). Most of which have at least dual, if not 4-8 power supplies each. Plus storage which usually has many PSUs in each system. My past endevors usually drove the hardware as long as we could, so definately saw much more failure at the end of useful life. Current endevors have a much more reasonable hardware refresh cycle, so we would retire gear before the typical failure cycles kick in. Even so, I think the industry learned hard that cheaping out on components like electrolytic capacitors and saving those pennies per component was foolish when they had to spend lots of money RMAing them down the road when the cheap ones failed, and if they only spend a few more cents per cap, they'd cut down on their RMA budget significantly. So, gear made in certain years, when the cheap crap flooded the market really had a much larger failure pool than before then, or after the lesson was learned.
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