From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) by finch.gentoo.org (Postfix) with ESMTP id A544D1381F3 for ; Fri, 21 Jun 2013 17:56:37 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 28F95E0ACD; Fri, 21 Jun 2013 17:56:31 +0000 (UTC) Received: from relay.sgi.com (relay3.sgi.com [192.48.152.1]) by pigeon.gentoo.org (Postfix) with ESMTP id 5018DE0A9F for ; Fri, 21 Jun 2013 17:56:30 +0000 (UTC) Received: from conejo.engr.sgi.com (unknown [10.202.12.106]) by relay3.corp.sgi.com (Postfix) with ESMTP id 765EBAC002 for ; Fri, 21 Jun 2013 10:56:29 -0700 (PDT) Received: from sgi.com (conejo.engr.sgi.com [10.202.12.106]) by conejo.engr.sgi.com (Postfix) with ESMTP id 3EB8361E876A for ; Fri, 21 Jun 2013 10:56:29 -0700 (PDT) Date: Fri, 21 Jun 2013 10:56:29 -0700 From: Bob Sanders To: gentoo-amd64@lists.gentoo.org Subject: Re: [gentoo-amd64] Re: Is my RAID performance bad possibly due to starting sector value? Message-ID: <20130621175629.GC11236@sgi.com> Mail-Followup-To: gentoo-amd64@lists.gentoo.org References: Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-amd64@lists.gentoo.org Reply-to: gentoo-amd64@lists.gentoo.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Organization: SGI, Fremont, California, U.S.A. User-Agent: Mutt/1.5.21 (2010-09-15) X-Archives-Salt: a92dceb1-bc79-4961-9b3e-3423ed40981a X-Archives-Hash: ceda75c78681e57ef8863193007e503e Mark Knecht, mused, then expounded: > On Fri, Jun 21, 2013 at 12:31 AM, Duncan <1i5t5.duncan@cox.net> wrote: > > Mark Knecht posted on Thu, 20 Jun 2013 12:10:04 -0700 as excerpted: > > > > Basic Machine - ASUS Rampage II Extreme motherboard (4/1/2010) + 24GB > DDR3 + Core i7-980x Extreme 12 core processor The hit to iop performance is mainly due to the large number of cores in the the high end Intel cpu. I suggest you find a nice 4-core Intel processor, something non-extreme. you'll find all your IO will improve. > 1 SDD - 120GB SATA3 on it's own controller > 5+ HDD - WD5002ABYS RAID Edition 3 SATA3 drives using Intel integrated > controllers > Again, if you're serious about RAID, get an LSI MegaRAID card. While I have my dislikes about the LSI controller, it's a lot faster than using MD and much faster (and more reliable) than any bios software RAID. Oh, and don't believe all the published numbers on drives, etc...benchmarking is an art. Bob -- -