From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oAO1d9Qd041567 for ; Tue, 23 Nov 2010 19:39:09 -0600 Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id DA7061C6C787 for ; Tue, 23 Nov 2010 17:40:46 -0800 (PST) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id SX8uOVPELLkHxFTT for ; Tue, 23 Nov 2010 17:40:46 -0800 (PST) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id A54526C154 for ; Tue, 23 Nov 2010 19:40:45 -0600 (CST) Message-ID: <4CEC6D1D.1080706@hardwarefreak.com> Date: Tue, 23 Nov 2010 19:40:45 -0600 From: Stan Hoeppner MIME-Version: 1.0 Subject: Re: Xfs delaylog hanged up References: <4CEAC412.9000406@shiftmail.org> <20101122232929.GJ13830@dastard> <4CEBA2D5.2020708@shiftmail.org> <20101123204609.GW22876@dastard> <20101123234811.0ea3c41c@galadriel.home> <4CEC5E15.7080307@shiftmail.org> In-Reply-To: <4CEC5E15.7080307@shiftmail.org> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: xfs@oss.sgi.com Spelic put forth on 11/23/2010 6:36 PM: > On 11/23/2010 11:48 PM, Emmanuel Florac wrote: >> So Spelic, you're using the 3Ware as a SATA controller, but not a RAID >> controller? This is quite unexpected, though going with md >> instead provides better IOPS. >> > > Yep, because I know MD better, I can see the code, it's more flexible > and customizable, can be controlled with scripts more easily... Also > parameters to the underlying drives can be controlled if I use MD, and > it's easier to align filesystem to stripes. Also my time is better spent > learning it as MD won't change the next time I buy a different hw > controller. > What would be the advantage of using hardware raid? If there is no advantage then why buy an $800+ real hardware RAID card and then deploy it as a vanilla SAS/SATA HBA with software RAID? What a waste of a decent RAID card... You could have gone with two of these instead http://www.newegg.com/Product/Product.aspx?Item=N82E16816117157 saving ~$500 and having similar if not slightly better performance with software RAID. -- Stan _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs