From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262355AbTJGOjl (ORCPT ); Tue, 7 Oct 2003 10:39:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262332AbTJGOjl (ORCPT ); Tue, 7 Oct 2003 10:39:41 -0400 Received: from mion.elka.pw.edu.pl ([194.29.160.35]:17069 "EHLO mion.elka.pw.edu.pl") by vger.kernel.org with ESMTP id S262412AbTJGOji (ORCPT ); Tue, 7 Oct 2003 10:39:38 -0400 From: Bartlomiej Zolnierkiewicz To: tigran@aivazian.fsnet.co.uk, Thomas Horsten Subject: Re: [PATCH] [2.4.XX] Silicon Image/CMD Medley Software RAID Date: Tue, 7 Oct 2003 16:42:59 +0200 User-Agent: KMail/1.5.4 Cc: linux-kernel@vger.kernel.org References: <8393446.1065535371042.JavaMail.www@wwinf3002> In-Reply-To: <8393446.1065535371042.JavaMail.www@wwinf3002> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-2" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200310071642.59676.bzolnier@elka.pw.edu.pl> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi Tigran, IMO Silicon Image is a good hardware. On Tuesday 07 of October 2003 16:02, tigran@aivazian.fsnet.co.uk wrote: > Hi Thomas, > > While we are on the subject of Silicon Image hardware, I wanted to ask --- > is this normal that this hardware (boxed as "EIO AP-1680 IDE RAID card"), > see this URL for more info): > > http://www.ivmm.com/eio/products_ap1680.html > > so horrendously slow, without even using any of its RAID functions (which > would be slow understandably as they are software RAID)? > > Numbers. My IDE drives perform 22-25M/sec (hdparm -t) when connected > to the onboard IDE controller (6BXD SMP motherboard, old, 2xPIII550, 1G > RAM) but when connected to this RAID card and used as plain physical disks > (no RAID sets configured) they give 2M/sec using DMA and 4M/sec when I > disable DMA. What kernel version? dmesg please. > I see many people mentioning Silicon Image hardware here, so I assumed > it is a useable hardware, but if everyone is getting 2M/sec (or 4M/sec and > hog the whole system performance with PIO!) then am I the first one who > noticed that the king is, in fact, naked? Shouldn't I expect a decent > 20-25M/sec hdparm -t from the drives connected to the additional IDE card > (be it RAID or no RAID, just extra IDE slots)? There is a rqsize limit problem with SiI SATA controllers (please search archive for discussion), but ATA shouldn't be affected. --bartlomiej