I'm seeing the same issue with an EMC clariion, see attached syslog. On my systems this problem leads to hanging processes and a server crash that can only be fixed with a reboot ..
** Attachment added: "syslog of multipath failure" https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/1032550/+attachment/3456041/+files/syslog_multipath_fail.gz -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to multipath-tools in Ubuntu. https://bugs.launchpad.net/bugs/1032550 Title: [multipath] failed to get sysfs information To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/1032550/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs