From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx1.redhat.com (mx1.redhat.com [172.16.48.31]) by int-mx1.corp.redhat.com (8.11.6/8.11.6) with SMTP id i1DE6Ti16887 for ; Fri, 13 Feb 2004 09:06:29 -0500 Received: from sbbmail1.sbb.ch (sbbmail1.sbb.ch [193.192.251.19]) by mx1.redhat.com (8.11.6/8.11.6) with SMTP id i1DE6Sb23241 for ; Fri, 13 Feb 2004 09:06:28 -0500 Received: from intmail2.sbb.ch (intmail2.sbb.ch [10.104.85.251]) by sbbmail1.sbb.ch (Switch-3.1.4/Switch-3.1.0) with ESMTP id i1DE6G0v013184 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=FAIL) for ; Fri, 13 Feb 2004 15:06:16 +0100 Received: from gmx.net (i34390.sbb.ch [147.78.17.245]) by intmail2.sbb.ch (Switch-3.1.4/Switch-3.1.0) with ESMTP id i1DE6G9i027487 for ; Fri, 13 Feb 2004 15:06:16 +0100 Message-ID: <402CD9D6.5CAAA796@gmx.net> From: Thomas Meller MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [linux-lvm] Volume groups on SAN storage Sender: linux-lvm-admin@redhat.com Errors-To: linux-lvm-admin@redhat.com Reply-To: linux-lvm@redhat.com List-Help: List-Post: List-Subscribe: , List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: Date: Fri Feb 13 09:05:33 2004 List-Id: Content-Type: text/plain; charset="us-ascii" To: linux-lvm@redhat.com Hello everybody, recently (today) I had a problem. I'm trying to create a HA Cluster for a DCE server. This is difficult work and sometimes very confusing. My goal is to make it bootable from a SAN. So far I managed to install GRUB and boot the machine. The rootfs and the rest can be mounted. I found, then, that the SCSI-devices inside one of my volume groups were the wrong ones. What is special about that is that the same content on a device can be seen on different SCSI-devices. This is due to some mirroring within the storage sytems. I cannot avoid that. Now, I have a readonly physical volume inside one of my volume groups. I want to insert the writeable mirror and get rid of the readonly. AFAICS this is not possible because I cannot force vgscan to insert a specified SCSI-device. Of course the VGDA is marked "part of VG xxx" and cannot be written anymore. So it cannot be imported nor exported or added to a new VG. Maybe there is an option anywhere how to scan a particular device. Does anybody know how to trick LVM? Is there a hexeditor to patch the VGDA backups to use different /dev/sdXX devices? And if so, does that help? I'm using redhat 8.0 and I'm bound to that version. TIA Thomas -- Thomas Meller mailto: thomas.meller@t-systems.ch mailto: thomas.meller@gmx.net ---- ...Our continuing mission: To seek out knowledge of C, to explore strange UNIX commands, and to boldly code where no one has had a man page before.