From owner-freebsd-current@FreeBSD.ORG Fri Dec 18 12:01:11 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D606B10656AA for ; Fri, 18 Dec 2009 12:01:11 +0000 (UTC) (envelope-from mavbsd@gmail.com) Received: from mail-fx0-f227.google.com (mail-fx0-f227.google.com [209.85.220.227]) by mx1.freebsd.org (Postfix) with ESMTP id 50FC48FC26 for ; Fri, 18 Dec 2009 12:01:11 +0000 (UTC) Received: by fxm27 with SMTP id 27so2759333fxm.3 for ; Fri, 18 Dec 2009 04:01:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:sender:message-id:date:from :user-agent:mime-version:to:cc:subject:references:in-reply-to :content-type:content-transfer-encoding; bh=4z6uGy+Kyw1/JK9sP6oJa8lVeGc4G0JGaTycUqN+9Rw=; b=TVpFAD15nBt4AxIPhgZ/a0sVR9WiVJa4WYnKlzGBCCjwOLVzWxSLY4nqW518PhiQH2 XKV7xv689iMxj2s5ZBxyPVveyHyd1LM+8/VMByZw9eg6cFJbDwkXD+q7wZdvcBJ5RaJ4 N/vMJlyupgJIZV3Y1ahejIW/JO9pCL6+hwYBw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=sender:message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; b=vERxyErR/GfL0eixelyk2eXsDXDjregLRdP96pLukMn2VJ9HO7SM2d5zDKJZ73Hlah kx21OgLxsmlt2xoVft76OTDsPPjwkAn1RoWOKon+9uIWvf599Kr0RipAUy6/yO254pZS FeacKuXKF5mtSQaLpEvtJEvbXYqPJVeoP3CGc= Received: by 10.223.14.22 with SMTP id e22mr832675faa.42.1261137670316; Fri, 18 Dec 2009 04:01:10 -0800 (PST) Received: from mavbook.mavhome.dp.ua (pc.mavhome.dp.ua [212.86.226.226]) by mx.google.com with ESMTPS id 14sm1023880fxm.15.2009.12.18.04.01.08 (version=SSLv3 cipher=RC4-MD5); Fri, 18 Dec 2009 04:01:09 -0800 (PST) Sender: Alexander Motin Message-ID: <4B2B6F02.9050404@FreeBSD.org> Date: Fri, 18 Dec 2009 14:01:06 +0200 From: Alexander Motin User-Agent: Thunderbird 2.0.0.23 (X11/20091212) MIME-Version: 1.0 To: Alexander Zagrebin References: <1261066981.00195934.1261053602@10.7.7.3> <1261070581.00195950.1261057201@10.7.7.3> <1261135381.00196302.1261124403@10.7.7.3> In-Reply-To: <1261135381.00196302.1261124403@10.7.7.3> Content-Type: text/plain; charset=KOI8-R Content-Transfer-Encoding: 7bit Cc: freebsd-current@freebsd.org, 'Benjamin Close' Subject: Re: 8.0-RELEASE: disk IO temporarily hangs up (ZFS or ATA related problem) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 18 Dec 2009 12:01:11 -0000 Alexander Zagrebin wrote: > May be a problem is in ata? WD15EADS is a "green" series of drives. If you don't receive TIMEOUT messages, then commands probably complete successfully. Loads above 100% may mean that requests are running for few seconds. It shouldn't happen normally. Have you tried to check whole drive surface? Have you checked SMART reports? I had a drive onece, which had so many media problems and relocated sectors, that I was unable to burn CD from it, so slow it was. Same time there was no bad sectors on that drive, reported to OS, drive handled everything. It was just extremely slow. Have you tried to rewrite _while_ drive media with dd? Some media errors could only be resolved only during write operation. > Is there a method to completely reset sata channel and drive? > atacontrol reinit will do it? Yes. -- Alexander Motin