From owner-freebsd-questions Mon Jul 15 11: 8:20 2002 Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D87FA37B401 for ; Mon, 15 Jul 2002 11:08:15 -0700 (PDT) Received: from iota.root-servers.ch (iota.root-servers.ch [193.41.193.195]) by mx1.FreeBSD.org (Postfix) with SMTP id 01FDE43E31 for ; Mon, 15 Jul 2002 11:08:14 -0700 (PDT) (envelope-from gaml@buz.ch) Received: (qmail 39368 invoked from network); 15 Jul 2002 18:07:56 -0000 Received: from dclient217-162-129-56.hispeed.ch (HELO gaxp1800) (217.162.129.56) by 0 with SMTP; 15 Jul 2002 18:07:56 -0000 Date: Mon, 15 Jul 2002 19:21:15 +0200 From: Gabriel Ambuehl X-Mailer: The Bat! (v1.60q) Educational Reply-To: Gabriel Ambuehl X-Priority: 3 (Normal) Message-ID: <190383009515.20020715192115@buz.ch> To: questions@freebsd.org Subject: atacontrol based software only RAID MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Hello, after messing around with atacontrol software RAID a bit I became quite confident that this can't be any worse than the el cheapo IDE RAID (Highpoint, Promise, CMD) that we commonly use around here and figured I could as well ditch the controllers and use the PCI slots for something else. But now I stumbled about the last remaining machine that doesn't have any RAID at all and am wondering how I go about initializing the array. Basically, I can create one with atacontrol create and then use dd to copy over the data from the primary to the secondary disk but I don't know what's going to happen if I do this in multi user (as taking down a production webserver for ~40 minutes to do it in single user isn't really a viable option). Will dd just copy over all the data from drive 1 and any writes during that time (which surely will happen, you gotta have access_log after all) will get mirrored to both disk by atacontrol so that I end up with a perfectly synced pair of disks once dd is over? Any comments would be greatly appreciated. TIA & regards, Gabriel To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message