From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262353AbTJGOCz (ORCPT ); Tue, 7 Oct 2003 10:02:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262337AbTJGOCz (ORCPT ); Tue, 7 Oct 2003 10:02:55 -0400 Received: from smtp1.freeserve.com ([193.252.22.158]:2911 "EHLO mwinf3003.me.freeserve.com") by vger.kernel.org with ESMTP id S262332AbTJGOCx (ORCPT ); Tue, 7 Oct 2003 10:02:53 -0400 Message-ID: <8393446.1065535371042.JavaMail.www@wwinf3002> From: tigran@aivazian.fsnet.co.uk Reply-To: tigran@aivazian.fsnet.co.uk To: Thomas Horsten Subject: Re: [PATCH] [2.4.XX] Silicon Image/CMD Medley Software RAID Cc: linux-kernel@vger.kernel.org Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 7bit Date: Tue, 7 Oct 2003 16:02:51 +0200 (CEST) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 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. 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)? Kind regards Tigran