Date: Fri, 10 Sep 2004 11:38:03 +0200 From: "Angelo Turetta" <aturetta@rainbownet.com> To: =?iso-8859-1?Q?S=F8ren_Schmidt?= <sos@DeepCore.dk>, "Kevin Oberman" <oberman@es.net> Cc: sos@FreeBSD.ORG Subject: Re: poor ATA disk speed with ICH2 Message-ID: <007501c49719$df5bd2d0$1e21a8c0@lan> References: <20040909202807.1F5295D09@ptavv.es.net>
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>----- Original Message ----- >From: "Kevin Oberman" <oberman@es.net> >Sent: Thursday, September 09, 2004 10:28 PM > > While the test is running, the disk being written to "sings" with the > frequency somewhat dependent on the size of the write. On read, I get > silence. When I copy my full disk (if=ad0 of=ad2), I can clearly hear > the sound of the actuator moving the heads constantly toward the end of > the backup. I assume that they are being returned to track 0 on a > repeated basis. This sounds a lot like thermal recalibration seeks, to me. Except it's something modern hardware is supposed to need very rarely, if not at all... Might be the effect of some power-saving setting intruduced in 5.x ? (or maybe the new ATA code is actually so fast it's overheating your disks :-) :-) Angelo Turetta
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