From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay1.corp.sgi.com [137.38.102.111]) by oss.sgi.com (Postfix) with ESMTP id 495E57F3F for ; Thu, 5 Jun 2014 19:48:07 -0500 (CDT) Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by relay1.corp.sgi.com (Postfix) with ESMTP id 28A498F8035 for ; Thu, 5 Jun 2014 17:48:04 -0700 (PDT) Received: from mail-wi0-f175.google.com (mail-wi0-f175.google.com [209.85.212.175]) by cuda.sgi.com with ESMTP id zbiZgs4bdzOs9vNR (version=TLSv1 cipher=RC4-SHA bits=128 verify=NO) for ; Thu, 05 Jun 2014 17:48:02 -0700 (PDT) Received: by mail-wi0-f175.google.com with SMTP id f8so77961wiw.8 for ; Thu, 05 Jun 2014 17:48:01 -0700 (PDT) Message-ID: <53910FBE.6090109@gmail.com> Date: Fri, 06 Jun 2014 03:47:58 +0300 From: Martin Papik MIME-Version: 1.0 Subject: Re: XFS filesystem claims to be mounted after a disconnect References: <20140503030221.GJ26353@dastard> <538C5E67.6090005@gmail.com> <20140602234135.GO6677@dastard> <538D9412.3040009@gmail.com> <538DA7FF.4080002@gmail.com> <20140603212834.GG14410@dastard> <538E4E1B.1020003@gmail.com> <20140605005538.GB4523@dastard> <5390C77E.4020003@gmail.com> <20140605224140.GB4453@dastard> In-Reply-To: <20140605224140.GB4453@dastard> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: Dave Chinner Cc: Linux fs XFS -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Thanks Dave But wouldn't the same thing that prevents xfs_repair also prevent dm-multipath from using the device? Or would you typically setup a partitioning or volume scheme on top of dm-multipath? Martin > No. Use dm-multipath to make them appear as a single block device > made up as a pair of redundant paths in primary/secondary failover > or active/active load balancing configurations. dm-multipath > handles failover between the two block devices on path failure > transparently. > > XFS | dm-mp-0 / \ sdc sdd > > The mounted filesystem doesn't even know there are multiple paths > in this configuration, however the XFS UUID trapping behaviour > avoids this problem by preventing you from doing XFS operations > directly on /dev/sdc or /dev/sdd while the filesystem is mount on > /dev/dm-mp-0.... > > Cheers. > > Dave. > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCgAGBQJTkQ+yAAoJELsEaSRwbVYrJB4QAIyjUk7un+bth/5WnW/imwoh CGlkS7kuU8Iu96VqwoojOZtY6RcUX5Yq+NoW7NDigFv0iEkaM2j0wg8JoNw6EFqX uiJuCkBUI3/v8QkFU0GtA4/6NFsu9N709f8J0ilof20L0bNm2wh7SiXqrp28X3HS 8Y1G50PXbBnEM5yKbmXLpVTOhEw35NlaPKBYZ5gBFohPXDb4+J6+g0kJD5wZPSWK lsHyW8tuuntGIZTtGZ4sHvak5THCXILClmFcPrdzzU110c601RTzJfeq9L7QXTMI thrUH3KGvT2s4vTwqLLFHdBZNwEXi2X0PaiM7uO0/AYvaaoDfwnLh0lJmSSxRFZn YYFa6Ko20l4nxFZoy6eRUh8vxvOat4VOlYowlyEcnPTE1nSeJfulun94ztjNXs2k 5VtWlFh12CXSVrynXBVnYKvFOAdecZcztqxjAjjTcjIrWHbZv0UXFtflG1V+zjgD 63SqxwShL2C/685gFXHh7mY0K2vAbnBK+IrRSTWMKVMZ16OuuIFA2WZebnskDfAf vWWFv8mAEAUP/xYF7u4g4XVov2aQAVxjDosXxuqUbW8QHlTXNB/wc7akXgoD3fmZ u0cB5Paw9JJeGt5eKYbtReL+Wt3STKtYGu2yNOZo/oiUr0uuoAkcjSfUGqrdu6HL kQgRYDDjQt37JPVIyyNK =55eH -----END PGP SIGNATURE----- _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs