Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 14 Apr 2001 05:31:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 14 Apr 2001 05:31:08 -0400 Received: from mailout04.sul.t-online.com ([194.25.134.18]:32529 "EHLO mailout04.sul.t-online.com") by vger.kernel.org with ESMTP id convert rfc822-to-8bit; Sat, 14 Apr 2001 05:31:01 -0400 Content-Type: text/plain; charset=US-ASCII From: Andreas Peter To: linux-kernel@vger.kernel.org Subject: Re: SW-RAID0 Performance problems Date: Sat, 14 Apr 2001 11:38:06 +0200 X-Mailer: KMail [version 1.2] In-Reply-To: <01041318282003.00665@debian> <20010414000433.F4557@greenhydrant.com> In-Reply-To: <20010414000433.F4557@greenhydrant.com> MIME-Version: 1.0 Message-Id: <01041411380600.00516@debian> Content-Transfer-Encoding: 7BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Am Samstag, 14. April 2001 09:04 schrieb David Rees: > OK, so it's not the RAID setup. There's two things that can cause this. > One is that DMA is turned off (what does hdparm /dev/hda and hdparm > /dev/hdc show?), the second was that the drives are on the same channel > (which obviously isn't the case here). Can you verify that the drives are > in DMA mode? hdparm /dev/hda /dev/hda: multcount = 16 (on) I/O support = 0 (default 16-bit) unmaskirq = 0 (off) using_dma = 1 (on) keepsettings = 0 (off) nowerr = 0 (off) readonly = 0 (off) readahead = 8 (on) geometry = 59556/16/63, sectors = 60032448, start = 0 the same on /dev/hdc I played with different hdparm-settings, but it's not possible to speed up the HDs Andreas -- Andreas Peter *** ujq7@rz.uni-karlsruhe.de - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/