From mboxrd@z Thu Jan 1 00:00:00 1970 From: "J. Ryan Earl" Subject: Re: Linux SATA RAID FAQ Date: Fri, 13 Aug 2004 18:31:44 -0600 Sender: linux-ide-owner@vger.kernel.org Message-ID: <411D5D70.9070909@clanhk.org> References: <411B0F45.8070500@pobox.com> <20040812113413.GA19252@alpha.home.local> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from ms-smtp-02.texas.rr.com ([24.93.47.41]:50318 "EHLO ms-smtp-02-eri0.texas.rr.com") by vger.kernel.org with ESMTP id S267726AbUHMXbq (ORCPT ); Fri, 13 Aug 2004 19:31:46 -0400 In-Reply-To: <20040812113413.GA19252@alpha.home.local> List-Id: linux-ide@vger.kernel.org To: Willy Tarreau Cc: Jeff Garzik , Linux Kernel , "linux-ide@vger.kernel.org" Willy Tarreau wrote: >I like it. It's fairly simple. I'm always amazed how many people do really >believe that these cards provide hardware RAID !!! The problem is when you >ask a reseller to add a real hardware RAID card in a system you purchase >and you end up with a cheap silicon image... It happened to us once and it's >not funny at all. > On the brightside, md raid5 is often faster than hardware raid5. At least on the 7000 and 8000 series of 3ware hardware; the 9000 series looks promising though. I haven't seen megaraid SATA numbers, and I don't know what happened to the SX8. When the libata Marvell drivers come out, you'll have a cheap upgrade path for PCI-X boards if you want fast md raid: http://www.supermicro.com/products/accessories/addon/DAC-SATA-MV8.cfm $100 to add 8 unbottlenecked SATA ports to your server motherboard. -ryan