Multipath Device Mapper Error Adding Target To Table
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Ovirt "multipath: Error Getting Device"
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Re: [dm-devel] Fwd: multipath errors Date: Fri, 27 Sep 2013 15:11:04 -0500 On Mon, Sep 23, 2013 at 11:09:18AM +0300, Amitai Alkalay wrote: > Hi, > Sorry for bumping, but I will appreciate any help on
Device-mapper: Table: 253:6: Multipath: Error Getting Device
this matter.. > Thanks, > Amitai > > ---------- Forwarded message ---------- > device-mapper: ioctl: error adding target to table suse From: Amitai Alkalay <[1]amitai alkalay work gmail com> > Date: Tue, Sep 10, 2013 at 2:29 PM > Subject: multipath errors multipath error getting device centos > To: [2]dm-devel redhat com > > hi, > I sometimes see cases where io failed after some path failover, although > there are other valid paths. > I seem to get a https://access.redhat.com/discussions/1307143 lot of the following errors during a path removal > (failover): > > Aug 1 08:59:37 lg641 multipathd: 3514f0c532d80000a: failed in domap for removal of path sdcy > Aug 1 08:59:37 lg641 multipathd: uevent trigger error > Aug 1 08:59:37 lg641 multipathd: sdt: remove path (uevent) > Aug 1 08:59:37 lg641 kernel: device-mapper: table: 253:5: multipath: error getting device > Aug 1 08:59:37 lg641 kernel: device-mapper: ioctl: https://www.redhat.com/archives/dm-devel/2013-September/msg00168.html error adding target to table > Aug 1 08:59:37 lg641 multipathd: 3514f0c532d800001: load table [0 21474836480 multipath 0 0 1 1 queue-length 0 12 1 66:240 1 66:80 1 70:192 1 71:96 1 67:176 1 67:112 1 71:224 1 128:128 1 8: > 16 1 69:16 1 69:32 1 8:32 1] > Aug 1 08:59:37 lg641 multipathd: sdt: path removed from map 3514f0c532d800001f > > All the other paths are there, and still multipath decided to fail the io > with no apparent reason.� > > I would appreciate any comment about: > > 1. How can this happen. It shouldn't. The kernel should check through all of the paths before failing. Sometimes some actions on storage arrays temporarily bring all paths down, but even in that case, you should see messages in the logs of multipath trying all the paths before it fails. > 2. How can I increase the log level to understand multipath decisions. in /etc/multipath.conf defaults { ... verbosity 3 } This will add a lot of extra logging. Make sure that your logging isn't rate limited, or you will miss messages exactly when it's most important to see them. > 3. Why do I
issue after upgrade from 5.5 to 5.6 General support questions including new installations Post Reply Print view Search Advanced search 11 posts 1 2 Next cramblda Posts: 7 Joined: 2011/07/16 05:28:13 [RESOLVED] device-mapper issue after upgrade http://www.centos.org/forums/viewtopic.php?t=17607 from 5.5 to 5.6 Quote Postby cramblda » 2011/07/16 05:47:28 I updated from 5.5 to 5.6 today and now my /dev/vg0/lvol0 mount point is not showing up and I am seeing the following kernel messages on boot up:md: Autodetecting RAID arrays.md: autorun ...md: ... autorun DONE.device-mapper: multipath: version 1.0.6 loadeddevice-mapper: table: 253:4: linear: dm-linear: Device lookup faileddevice-mapper: ioctl: error adding target to tableLinux 2.6.18-238.12.1.el5 #1 SMP Tue May 31 13:23:01 EDT 2011 error getting i686 i686 i386 GNU/LinuxDid some research and found info regarding dmsetup:#dmsetup statusvg0-lvol0:pdc_eehgddjjp1: 0 976768002 linearpdc_eehgddjj: 0 976772992 linearvia_cdeadaheebp1: 0 976768002 linearvia_cdeadaheeb: 0 1953546240 striped 2 8:0 8:16 1 AALooks like something is wrong with the vg0-lvol0 entry above, but I can't figure out how to fix it.David Top cramblda Posts: 7 Joined: 2011/07/16 05:28:13 Re: device-mapper issue after upgrade from 5.5 to 5.6 Quote Postby cramblda » 2011/07/16 05:50:27 I should error getting device also note the system has 5 Hard Disk Drives. So two additional drives are missing from each of the pdc and via controllers in the "dmsetup status" output Top pschaff Retired Moderator Posts: 18276 Joined: 2006/12/13 20:15:34 Location: Tidewater, Virginia, North America Contact: Contact pschaff Website [RESOLVED] device-mapper issue after upgrade from 5.5 to 5.6 Quote Postby pschaff » 2011/07/17 19:22:35 Welcome to the CentOS fora. Please see the recommended reading for new users linked in my signature.Please provide more information about your system by running "./getinfo.sh" as root and showing us the output file. Top cramblda Posts: 7 Joined: 2011/07/16 05:28:13 Re: device-mapper issue after upgrade from 5.5 to 5.6 Quote Postby cramblda » 2011/07/17 20:32:10 Thanks Phil. After reviewing the output from the getinfo.sh script, I noticed that the partition type on two of my disks (sdc and sdd) is Linux "type 83" when they should be LVM "type 8e". I don't know how they would have been changed or if this could cause my issue, but I will investigate to see if I can change these safely with fdisk.System and Disk Info:Code: Select all== BEGIN uname -rmi ==
2.6.18-238.12.1.el5 i686 i386
== END uname -rmi ==
== BEGIN rpm -qa \*-release\* ==
centos-release-5-6.el5.centos.1
centos-release-notes-5.6-0
== END rpm -qa \