From owner-freebsd-questions@FreeBSD.ORG Wed Jul 30 13:56:02 2003 Return-Path: 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 7471C37B401 for ; Wed, 30 Jul 2003 13:56:02 -0700 (PDT) Received: from station189.com (station189.com [203.194.198.184]) by mx1.FreeBSD.org (Postfix) with SMTP id 44D9943FB1 for ; Wed, 30 Jul 2003 13:56:01 -0700 (PDT) (envelope-from rtjohan@syspres.com) Received: (qmail 9276 invoked from network); 30 Jul 2003 20:56:06 -0000 Received: from unknown (HELO rjc800) (12.234.42.231) by station189.com with SMTP; 30 Jul 2003 20:56:06 -0000 From: "Richard Johannesson" To: Date: Wed, 30 Jul 2003 13:52:17 -0700 Message-ID: <004301c356dc$76e9e620$3d01a8c0@rjc800> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal Subject: Mirroring Vinum Volumes - importance of subdisk sequence on mirror device X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: rtjohan@syspres.com List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Jul 2003 20:56:02 -0000 Question: Is it important that the sequence plexes/sub-disks get created in for = the primary drive and the mirrored drive be the same? Any performance = penalty?=20 I'm guessing that a different sub-disk creation order will put the = sub-disks in different places on a disk. Background - if needed: Have 10 vinum volumes being mapped by 10 plexes to the root drive. To get mirroring, I created plexes/sub-disks for swap, root, and usr = using the specific offsets for each on the 2nd hdd device and map them back to their specific volumes they should be mirroring. When I start creating the other plexes/sub-disks on the 2nd hdd and map = them back to the volume already setup, I won't be using specific offsets. Thanks, Richard