From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tyler Subject: Re: Playing with SATA NCQ Date: Sun, 29 May 2005 07:24:14 -0700 Message-ID: <4299D08E.2020706@dtbb.net> References: <20050526140058.GR1419@suse.de> <429793C8.8090007@gmail.com> <42979C4F.8020007@pobox.com> <42979FA3.1010106@gmail.com> <20050528121258.GA17869@suse.de> <4299BD23.6010004@gmail.com> <4299CD31.8020805@rtr.ca> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from outbound05.telus.net ([199.185.220.224]:27781 "EHLO priv-edtnes40.telusplanet.net") by vger.kernel.org with ESMTP id S261323AbVE2OY1 (ORCPT ); Sun, 29 May 2005 10:24:27 -0400 Received: from [192.168.0.28] (really [142.179.55.145]) by priv-edtnes40.telusplanet.net (InterMail vM.6.01.04.04 201-2131-118-104-20050224) with ESMTP id <20050529142425.CEOG24124.priv-edtnes40.telusplanet.net@[192.168.0.28]> for ; Sun, 29 May 2005 08:24:25 -0600 In-Reply-To: <4299CD31.8020805@rtr.ca> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org Mark Lord wrote: > My basic hdparm timing test shouldn't show much of a difference > with NCQ tests, becase hdparm just does a single request at a time, > and waits for the results before issuing another. Now, kernel read-ahead > may result in some command overlap and a slight throughput increase, > but.. > > Something like dbench and/or bonnie++ are more appropriate here. > > Cheers > - > To unsubscribe from this list: send the line "unsubscribe linux-ide" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > How effective can NCQ be in a RAID5/RAID6 environment? If at all? I wouldn't think it would be.. but maybe i'm not seeing the forest for the trees.. Regards, Tyler.