From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Victoria A Smith" Subject: Re: bindings file; rename WWID to mpath alias Date: Mon, 26 Apr 2010 16:21:35 -0600 Message-ID: <4BD611EF.4010301@sandia.gov> References: <4BD5F07A.7040005@sandia.gov> <1272322814.16254.14.camel@localhost> <4BD601E5.6060705@sandia.gov> <1272326179.16254.33.camel@localhost> Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1272326179.16254.33.camel@localhost> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: dm-devel@redhat.com List-Id: dm-devel.ids Yes, that is good information. I am curious to know, however, if mixing the use of WWIDs and aliases can cause problems. In other words, I have a WWID which has an alias, but it is not being seen by the system: # dmsetup ls --target multipath mpath9 (253, 6) mpath8 (253, 5) mpath14 (253, 9) mpath7 (253, 4) mpath13 (253, 8) 350002ac002c506cc (253, 12) mpath12 (253, 7) mpath11 (253, 10) mpath10 (253, 11) I wonder if that can cause a problem. Regards, Victoria brem belguebli said the following on 04/26/2010 05:56 PM: > Best thing to do, if you don't want to destroy data, would be to: > > 1) copy your original bindings file from /var to /etc (in newer versions > of dm-multipath, bindings file is located under /etc/multipath/bindings) > and modify /etc/multipath.conf to tell it the location of bindings file > (cf /usr/share/doc/device-mapper-multipath-0.4.7/multipath.conf.annotated for the line to add, I don't have a 0.4.7 dm-mp configuration right now) > > 2) comment all /dev/mpath* relative entries in /etc/fstab (supposedly > you are mounting your devices thru fstab) either if using LVM or entire > raw disks. > > 3) reboot your system > > 4) mount manually each mpath (in respect to your bindings file) and make > sure they really correspond to the original ones. > > If so, you're done. > > Brem > > PS: rogue device is something I don't believe in, there is always a > reason for a device to be seen..... > > > > On Mon, 2010-04-26 at 15:13 -0600, Victoria A Smith wrote: >> It is on /var (/var/lib/multipath/bindings), and /var is a separate LV >> from /. >> >> I am beginning to think the WWID 350002ac002c506cc is a "rogue" device >> and should be removed from the system. >> >> Regards, >> >> Victoria >> >> >> brem belguebli said the following on 04/26/2010 05:00 PM: >>> Is your bindings file located on a different [lv|partition] than / ? >>> >>> It may cause this kind of troubles if so. >>> >>> Brem >>> >>> On Mon, 2010-04-26 at 13:58 -0600, Victoria A Smith wrote: >>> >>>> After a system crash I have filesystem access problems when >>>> the multipathd service is started. I noticed in the messages file >>>> and in output from multipath -ll that an alias is not being >>>> used: >>>> >>>> messages: [...] rename 350002ac002c506cc to mpath18 >>>> >>>> # multipath -ll >>>> [...] >>>> 350002ac002c506cc dm-12 3PARdata,VV >>>> >>>> # ls -1 /dev/mpath/ >>>> 350002ac002c506cc >>>> mpath10 >>>> [...] >>>> >>>> >>>> The bindings file has: >>>> [...] >>>> mpath18 350002ac002c506cc >>>> >>>> >>>> Can the apparent failure of the alias-to-WWID mapping cause any problems? >>>> >>>> >>>> RHEL5.5 >>>> 2.6.18-194.el5 >>>> device-mapper-multipath-0.4.7-34.el5 >>>> QLogic Fibre Channel HBA Driver: 8.03.01.04.05.05-k >>>> >>>> >>>> Thanks, >>>> >>>> Victoria >>>> >>>> >>>> -- >>>> dm-devel mailing list >>>> dm-devel@redhat.com >>>> https://www.redhat.com/mailman/listinfo/dm-devel >>>> >>> >>> -- >>> dm-devel mailing list >>> dm-devel@redhat.com >>> https://www.redhat.com/mailman/listinfo/dm-devel >>> >>> >> >> >> -- >> dm-devel mailing list >> dm-devel@redhat.com >> https://www.redhat.com/mailman/listinfo/dm-devel > > > -- > dm-devel mailing list > dm-devel@redhat.com > https://www.redhat.com/mailman/listinfo/dm-devel >