Hi, > I've tried: update OS, update drivers, update multipath, re-configurate > multipath... > did you update to multipath >= 0.4.6 ? > What do you think I should try now ? > Probably I've missed it - but how do you access the CX? Via a switch? direct? How many HBAs do you use? Are they all allowed to connect to the machine? Did you try it without any multipath.conf at all? The defaults in 0.4.6 work well. > LUN_TESTES (360060160256014006adcbf64a644da11) > > [size=458 GB][features="0"][hwhandler="0"] > > \_ round-robin 0 [active] > > \_ 3:0:0:0 sdc 8:32 [failed][faulty] > > \_ 3:0:1:0 sdd 8:48 [failed][faulty] > > \_ 3:0:2:0 sde 8:64 [active][ready] > > \_ 3:0:3:0 sdf 8:80 [active][ready] > although sdc and sdd are faulty you should be able to access the LUN - you have 2 active and ready paths to it. Look for LUN_TESTES in your /dev directory. Do you have the right udev rules for multipath? As all distros do handle this on a different way - which distro and udev version are you using? Make sure dm events are not discarded. On debian sarge for example you ahve to change this in udev.rules: #KERNEL="dm-[0-9]*", OPTIONS="ignore_device" KERNEL="dm-[0-9]*", PROGRAM="/sbin/devmap_name %M %m", NAME="%k", SYMLINK="%c" Are the multipath rules for udev installed? Do you have any errors from udev in your log? I hope I could give you some more hints. Best regards, Bernd -- dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel