Date: Fri, 16 Oct 1998 06:09:15 -0500 From: David Kelly <dkelly@hiwaay.net> To: Terry Lambert <tlambert@primenet.com> Cc: freebsd-fs@FreeBSD.ORG, freebsd-scsi@FreeBSD.ORG Subject: Re: filesystem safety and SCSI disk write caching Message-ID: <199810161109.GAA16802@nospam.hiwaay.net> In-Reply-To: Message from Terry Lambert <tlambert@primenet.com> of "Thu, 15 Oct 1998 18:21:55 -0000." <199810151821.LAA15497@usr02.primenet.com>
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Terry Lambert writes: > > > If that's the reason for the problem that I saw, then the UPS the > > > system was plugged into wasn't sufficient to prevent the problem. > > > > Before you fight it too much more, replace the power supply. I've cured > > a number of "impossible" problems with a new power supply. > > Uh, you won't cure "Don punching the reset button to simulate a > particular set of hardware failures" with a new supply. > > 8-). Why not? It might be interesting to put a recording voltmeter such as a digital storage oscilloscope on the HD power leads when Don is punching the reset. No telling what kind of voltage surges are generated when the load on the power supply is altered. No telling *if* there are changes in the PS load when reset is punched either. Think my PPro-166 CPU pulls 10A. If it suddenly stops pulling that much current when RESET is active then what does the PS do? -- David Kelly N4HHE, dkelly@nospam.hiwaay.net ===================================================================== The human mind ordinarily operates at only ten percent of its capacity -- the rest is overhead for the operating system. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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