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> References: <200108220315.UAA06753@mina.soco.agilent.com>
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On Wednesday 22 August 2001 05:15, you wrote: > =09Well, "previously-owned cars" are also sold. It doesn't mean > =09that they're any good. M$ Windows is also sold. That doesn't > =09mean that it's good for you, either. =09I have seen really poor cases and power supplies around. Nowadays, wit= h many=20 people (I'm not saying that this is the case!) assuming that computers ar= e=20 unreliable and must be incredibly cheap, many manufacturers use poor qual= ity=20 components, even in "high-end" products. For example, I've got a "server"= box=20 (paid aboud $200 for it) approved by AMD for my Athlon system, and one of= the=20 fans has started to fail after two years. I'm tired of seeing Compaq or S= un=20 systems whose fans run for years. =09It is impossible to manufacture a good power supply and sell it for $2= 0. It=20 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. ] =09;-) The oscilloscope is a useful tool, indeed. I remember something I = saw=20 some years ago. We sent an industrial PC to a customer, and two days ago = the=20 disk was completely corrupted. We swapped it and the same happened. Someo= ne=20 checked the power line, and the UPS they were using was suplying a voltag= e=20 oscillating between 150 V and 240 V.=20 =09So, I don't think using an oscilloscope is "going on a tangent" ;-) =09Borja. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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