From owner-freebsd-hackers@FreeBSD.ORG Fri Oct 28 09:55:28 2005 Return-Path: X-Original-To: hackers@freebsd.org Delivered-To: freebsd-hackers@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id F371816A41F; Fri, 28 Oct 2005 09:55:27 +0000 (GMT) (envelope-from ray@redshift.com) Received: from mail.quickmeet.com (quickmeet.com [216.228.17.162]) by mx1.FreeBSD.org (Postfix) with ESMTP id B3CD743D45; Fri, 28 Oct 2005 09:55:27 +0000 (GMT) (envelope-from ray@redshift.com) Received: from workstation (workstation [192.168.20.250]) by mail.quickmeet.com (Postfix) with SMTP id A8AF217032; Fri, 28 Oct 2005 02:28:02 -0700 (PDT) Message-Id: <3.0.1.32.20051028025532.00a66e90@pop.redshift.com> X-Mailer: na X-Sender: redshift.com Date: Fri, 28 Oct 2005 02:55:32 -0700 To: Peter Jeremy , "Mikhail T." From: ray@redshift.com In-Reply-To: <20051028094844.GU39882@cirb503493.alcatel.com.au> References: <200510280518.j9S5I3oQ025430@blue.virtual-estates.net> <200510280518.j9S5I3oQ025430@blue.virtual-estates.net> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit Cc: hackers@freebsd.org, hardware@freebsd.org, sos@freebsd.org Subject: Re: Very slow writing to SATA disk X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 28 Oct 2005 09:55:28 -0000 At 07:48 PM 10/28/2005 +1000, Peter Jeremy wrote: | On Fri, 2005-Oct-28 01:18:03 -0400, Mikhail T. wrote: | >I've got a new Hitachi drive with 16Mb of cache: | > | > ad8: 476940MB at ata4-master SATA150 | > | >and am trying to use it to store backups online. Unfortunately, writing | >to the disk is painfully slow (by today's standards) -- it can barely | >keep 7Mb/second and my other (SCSI) disks run circles around it. | | If this drive doesn't support tagged-queueing, is the write cache | disabled? I get that sort of performance from a (PATA) disk with | the cache disabled (hw.ata.wc="0" in loader.conf) | | >According to smartctl, the drive runs at 56C during the copying. Its | >idle temperature seems to be 54C. | | I'd double-check that (eg with a finger). If the drive really is | running at 56°C, it won't last very long. | | -- | Peter Jeremy I just checked the temp on my workstation for comparison. It's running two SATA drives (74GB Raptors) and the temp on those drives is 30C/86F. Like Peter says, at 133F, I don't think they would last very long, not to mention you'd probably smell something hot/burning. Ray