From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx3.redhat.com (mx3.redhat.com [172.16.48.32]) by int-mx1.corp.redhat.com (8.13.1/8.13.1) with ESMTP id n1P54Wb2015975 for ; Wed, 25 Feb 2009 00:04:33 -0500 Received: from vms173019pub.verizon.net (vms173019pub.verizon.net [206.46.173.19]) by mx3.redhat.com (8.13.8/8.13.8) with ESMTP id n1P53Mll025895 for ; Wed, 25 Feb 2009 00:03:27 -0500 Received: from [192.168.1.2] ([96.255.155.44]) by vms173019.mailsrvcs.net (Sun Java(tm) System Messaging Server 6.3-7.04 (built Sep 26 2008; 32bit)) with ESMTPA id <0KFL007JQVD80US1@vms173019.mailsrvcs.net> for linux-lvm@redhat.com; Tue, 24 Feb 2009 23:03:18 -0600 (CST) Message-id: <49A4CE09.8070101@smart.net> Date: Tue, 24 Feb 2009 23:50:17 -0500 From: "Daniel B." MIME-version: 1.0 Subject: Re: [linux-lvm] re --corelog: does synchronization re-copy all data? References: <49A0A252.30803@smart.net> <20090223071132.GA9670@us.ibm.com> In-reply-to: <20090223071132.GA9670@us.ibm.com> Content-transfer-encoding: 7bit Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: linux-lvm@redhat.com malahal@us.ibm.com wrote: > Daniel B. [dsb@smart.net] wrote: >> More generally, can LVM perform RAID1-style mirroring with only >> two disks (without having to re-copy everything each boot) >> (and, of course, being recoverable in case either disk fails)? > > You should be able to force LVM to create a log device on one of your > two devices (--alloc anywhere) So what happens if the disk containing the log dies? Does LVM keep running (presenting the logical volume implemented on the physical volumes on the still-working disk)? (And what happens at reboot time (with the failed disk still in place)?) Thanks, Daniel -- Daniel B. dsb@smart.net