From owner-freebsd-hardware Wed Aug 22 3:18:42 2001 Delivered-To: freebsd-hardware@freebsd.org Received: from borja.sarenet.es (borja.sarenet.es [192.148.167.77]) by hub.freebsd.org (Postfix) with ESMTP id 8D68037B406 for ; Wed, 22 Aug 2001 03:18:34 -0700 (PDT) (envelope-from borjamar@sarenet.es) Received: from there (localhost [127.0.0.1]) by borja.sarenet.es (8.11.3/8.11.3) with SMTP id f7MAHeV17056; Wed, 22 Aug 2001 12:17:45 +0200 (CEST) (envelope-from borjamar@sarenet.es) Message-Id: <200108221017.f7MAHeV17056@borja.sarenet.es> Content-Type: text/plain; charset="iso-8859-1" From: Borja Marcos To: Darryl Okahata Subject: Re: 3ware stuff not ready for heavy duty useage-followup Date: Wed, 22 Aug 2001 12:17:40 +0200 X-Mailer: KMail [version 1.3] References: <200108220315.UAA06753@mina.soco.agilent.com> In-Reply-To: <200108220315.UAA06753@mina.soco.agilent.com> Cc: freebsd-hardware@freebsd.org MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: owner-freebsd-hardware@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org 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