From owner-freebsd-stable@FreeBSD.ORG Fri Feb 18 23:02:59 2011 Return-Path: Delivered-To: stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 77F281065673; Fri, 18 Feb 2011 23:02:59 +0000 (UTC) (envelope-from ftigeot@sekishi.zefyris.com) Received: from pizza.zefyris.com (pizza.zefyris.com [IPv6:2001:7a8:bd07:2::253]) by mx1.freebsd.org (Postfix) with ESMTP id DA4818FC18; Fri, 18 Feb 2011 23:02:58 +0000 (UTC) Received: from sekishi.zefyris.com (sekishi.zefyris.com [IPv6:2001:7a8:bd07:2:219:d1ff:fe81:e03]) by pizza.zefyris.com (8.14.4/8.14.4) with ESMTP id p1IN2u0Z059827; Sat, 19 Feb 2011 00:02:56 +0100 (CET) Received: from sekishi.zefyris.com (localhost [127.0.0.1]) by sekishi.zefyris.com (8.14.4/8.14.1) with ESMTP id p1IN2uUL002107; Sat, 19 Feb 2011 00:02:56 +0100 (CET) Received: (from ftigeot@localhost) by sekishi.zefyris.com (8.14.4/8.14.1/Submit) id p1IN2uE0002106; Sat, 19 Feb 2011 00:02:56 +0100 (CET) Date: Sat, 19 Feb 2011 00:02:56 +0100 From: Francois Tigeot To: Jeremy Chadwick Message-ID: <20110218230256.GA2038@sekishi.zefyris.com> References: <20110218164209.GA77903@nargothrond.kdm.org> <20110218223832.GA68261@icarus.home.lan> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110218223832.GA68261@icarus.home.lan> User-Agent: Mutt/1.4.2.3i X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.6 (pizza.zefyris.com [IPv6:2001:7a8:bd07:2::253]); Sat, 19 Feb 2011 00:02:56 +0100 (CET) Cc: freebsd-scsi@freebsd.org, stable@freebsd.org Subject: Re: mps(4) driver (LSI 6Gb SAS) commited to stable/8 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 18 Feb 2011 23:02:59 -0000 On Fri, Feb 18, 2011 at 02:38:32PM -0800, Jeremy Chadwick wrote: > > > Please be aware of a performance issue affecting certain models of WD > RE4 disks. Specifics are still sketchy, but you should read the thread > "immense delayed write to file system (ZFS and UFS2), performance > issues" in full to get an idea of the problem: > > http://lists.freebsd.org/pipermail/freebsd-stable/2010-January/thread.html#54185 > > There's confirmation of the problem here, with the statement that WD > gave at least one person a firmware image that fixed the problem: > > http://lists.freebsd.org/pipermail/freebsd-stable/2010-January/054489.html I'm not sure if this is exactly the same issue, but I also had to flash some WD drives a few month ago. There was a bad firmware version on some 2TB RE4-GP models; disks kept getting removed from RAID volumes due to write timeouts. > Buyer beware. :-) And remember, it's not an issue with the > brand/vendor, just certain models. Disks these days are no longer just disks, but complete computers with ram, many processors, and the associated software issues... -- Francois Tigeot