Date: Wed, 22 Aug 2001 12:17:40 +0200 From: Borja Marcos <borjamar@sarenet.es> To: Darryl Okahata <darrylo@soco.agilent.com> Cc: freebsd-hardware@freebsd.org Subject: Re: 3ware stuff not ready for heavy duty useage-followup Message-ID: <200108221017.f7MAHeV17056@borja.sarenet.es> In-Reply-To: <200108220315.UAA06753@mina.soco.agilent.com>
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On Wednesday 22 August 2001 05:15, you wrote: > Well, "previously-owned cars" are also sold. It doesn't mean > that they're any good. M$ Windows is also sold. That doesn't > mean that it's good for you, either. I have seen really poor cases and power supplies around. Nowadays, with many people (I'm not saying that this is the case!) assuming that computers are unreliable and must be incredibly cheap, many manufacturers use poor quality components, even in "high-end" products. For example, I've got a "server" box (paid aboud $200 for it) approved by AMD for my Athlon system, and one of the fans has started to fail after two years. I'm tired of seeing Compaq or Sun systems whose fans run for years. It is impossible to manufacture a good power supply and sell it for $20. It just wouldn't cover the prices of the components! > [ Going off on a slight tangent, it might be interesting to probe the > voltages with an oscilloscope, preferably a sampling one if available > (you've got to be careful about the usual electrocution, fire, and > component damage hazards, though ;-). You probably won't be able to > tell anything conclusive, however, unless the power's really dirty > (which would be a good indication that the power supply is the > culprit). Of course, you'd naturally have to do it under high-load > conditions. ] ;-) The oscilloscope is a useful tool, indeed. I remember something I saw some years ago. We sent an industrial PC to a customer, and two days ago the disk was completely corrupted. We swapped it and the same happened. Someone checked the power line, and the UPS they were using was suplying a voltage oscillating between 150 V and 240 V. So, I don't think using an oscilloscope is "going on a tangent" ;-) Borja. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the messagehome | help
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