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 (8.11.6/8.11.6) with ESMTP id i6N8rca30164 for ; Fri, 23 Jul 2004 04:53:38 -0400 Received: from sbbmail1.sbb.ch (sbbmail1.sbb.ch [193.192.251.19]) by mx3.redhat.com (8.12.10/8.12.10) with ESMTP id i6N8rWXn019693 for ; Fri, 23 Jul 2004 04:53:32 -0400 Received: from intmail2.sbb.ch (intmail2.sbb.ch [10.104.85.251]) by sbbmail1.sbb.ch (Switch-3.1.6/Switch-3.1.0) with ESMTP id i6N8rLHF005762 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=FAIL) for ; Fri, 23 Jul 2004 10:53:21 +0200 Received: from gmx.net (i34390.sbb.ch [147.78.17.245]) by intmail2.sbb.ch (Switch-3.1.6/Switch-3.1.6) with ESMTP id i6N8rKmH002348 for ; Fri, 23 Jul 2004 10:53:20 +0200 Message-ID: <4100D1DD.953FD20A@gmx.net> Date: Fri, 23 Jul 2004 10:52:45 +0200 From: Thomas Meller MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [linux-lvm] SAN Storage/mirror/lvm Reply-To: thomas.meller@gmx.net, 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" To: linux-lvm@redhat.com Maybe everything is all right with what I am doing - maybe not. I have heard roumors that my setup may cause troubles. Does anybody know something about it? I try to set up a cluster on a SAN with shared disks, mirrored over 2 storage controllers. Using QLogic HBAs, I have set ql2xfailover=1 to use the multipathing feature. We have 2 separate fabrics to connect to the storage and 2 HBAs in each machine. Disk layout: A B (controllers) sda sdf sdb sdg sdc mirror sdh -+ sdd mirror sdi | sde mirror sdj -+ | +-- volume group Also, we do not have much write thruput to the disks. I use reiserfs because I could resize it w/o remounting. Austin Gonyou has written something about write cache mirroring - what is that? Necessary? Howto? I use LVM1 Am I in danger? Thanks 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 man page has ever been seen