While having a second look at this I can conclude that the messages from device-mapper are due to a device that is not a multipath target, in which case it should be blacklisted in the multipath config file. This will make multipath to not map them, and using this we were able to no longer see the error messages. I was able to verify this on a 15.04 with upstream.
Ignoring local disks from multipath is also detailed here: https://help.ubuntu.com/lts/serverguide/multipath-setting-up-dm- multipath.html Given this and the fact that this didn't pose any issues from the initial report, we can close this issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1511534 Title: [Hyper-V] Fibre Channel multipath error message To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1511534/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
