From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eli Stair Subject: Re: Failover between two paths to one LU doesn't work onlinux-iscsi Date: Tue, 10 Oct 2006 10:24:56 -0700 Message-ID: <452BD768.30206@ilm.com> References: <452BD5C6.2080808@voltaire.com> Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <452BD5C6.2080808@voltaire.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: device-mapper development List-Id: dm-devel.ids What versions of the tools and kernel are you running? What are your settings for multipath.conf? Is multipathd running? If you run multipath -v2 manually, does it fail the path? Etc. > 1. Are there any known problems that can cause fail-over not to happen > in linux-iscsi? > 2. Is there any way to get debug information in order to understand more > in-depth what's going on? man multipath && man multipathd multipathd -d multipath -v4 > 3. How can I know what the timeouts are and how to change them? Timeouts occur at several levels. Your HBA or iSCSI driver will have (at least) one. Check the documentation for the aspects of software/hardware you're using (kernel module options), dm-multipath docs, etc. > 4. If you need more specific information, please write what can help. http://christophe.varoqui.free.fr/wiki/wakka.php?wiki=Home I've never done multipath-iscsi, so don't have direct experience. Try posting some more detailed info on your setup and what errors or info messages are occuring. /eli