From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261354AbVEaTtz (ORCPT ); Tue, 31 May 2005 15:49:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261400AbVEaTtz (ORCPT ); Tue, 31 May 2005 15:49:55 -0400 Received: from moutvdom.kundenserver.de ([212.227.126.249]:51962 "EHLO moutvdomng.kundenserver.de") by vger.kernel.org with ESMTP id S261354AbVEaTtx (ORCPT ); Tue, 31 May 2005 15:49:53 -0400 Message-ID: <429CBFE6.7030107@robotech.de> Date: Tue, 31 May 2005 21:49:58 +0200 From: Tobias Reinhard User-Agent: Mozilla Thunderbird 1.0 (Windows/20041206) X-Accept-Language: de-DE, de, en-us, en MIME-Version: 1.0 To: Lennart Sorensen CC: linux-kernel@vger.kernel.org Subject: Re: Problem with concurrent SATA-Writes References: <429C9BFA.5090901@robotech.de> <20050531190008.GJ23621@csclub.uwaterloo.ca> In-Reply-To: <20050531190008.GJ23621@csclub.uwaterloo.ca> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Lennart Sorensen wrote: > Might it be a problem with having two things using /dev/zero at the same > time? No, dding from /dev/zero two times at the same time is working perfectly > What blocksize do you use with dd? Generally I use 1M. But the Problem is the same with 128k or with 4k > What happens if you do dd from /dev/zero to two different files on one > of the hds (with some filesystem on the drive obviously)? I did it without a FS on it and its no problem to write at two different locations - as long as they are on one disc. It seems to me that the driver has problems with handling two write-requests on two ports at the same time. Tobias