>From examining the output and can see why the blacklist was defined in this manner, and how to correct it.
Also, since the luns are reporting themselves as DGC, specifying a configuration for SYMMETRIX just won't work. Clarion and Symmetrix are completely different animals from what I gather. Attached is a new multipath.conf (rename it correctly before moving to etc) that contains what I believe to be the configuration they're trying to achieve. Unfortunately, this is array is so configurable, all this effort could be a waste if it's not setup correctly. Should this config not work, try deleting the 'devices' section entirely and reboot. Multipath carries a configuration for DGC already that might work. # echo 'show config' | multipathd -k ... device { vendor DGC product .* product_blacklist LUNZ path_grouping_policy group_by_prio path_checker emc_clariion features 1 queue_if_no_path hardware_handler 1 emc prio_callout /sbin/mpath_prio_emc /dev/%n failback immediate no_path_retry 60 } Failing that I would suggest that the customer make the array work with powerpath first, so we know the HW is configured correctly, and then we can try again with multipath. ** Attachment added: "Experimental EMC Clarion config" https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/716659/+attachment/1878975/+files/multipath-v1.conf -- 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/716659 Title: Root filesystem goes "Read only" after installing multipath-tools on Lucid -- 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