From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hannes Dorbath Subject: Re: Software RAID5 Horrible Write Speed On 3ware Controller!! Date: Wed, 18 Jul 2007 13:37:15 +0200 Message-ID: <469DFB6B.2000103@theendofthetunnel.de> References: <20070718110525.GF13772@boogie.lpds.sztaki.hu> <469DF8D3.8020908@theendofthetunnel.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Justin Piszcz Cc: Hannes Dorbath , Gabor Gombas , linux-ide-arrays@lists.math.uh.edu, xfs@oss.sgi.com, linux-raid@vger.kernel.org, linux@vger.kernel.org List-Id: linux-raid.ids On 18.07.2007 13:32, Justin Piszcz wrote: > Yes I agree here, but I guess my question is why is SW RAID5 so slow on > the 3ware card? I think the controller does disable the drives write cache when exported unconfigured. It does always disable, unless you put the drive in a unit and explicit set the profile to `Performance'. -- Regards, Hannes Dorbath