Thanks Chandra, sorry for the out of order reply, still had the digest mode on. I setup the config similar to what you said devices { device { vendor "DELL" product "MD3000" hardware_handler "1 rdac" path_checker rdac path_grouping_policy group_by_prio prio_callout "/sbin/mpath_prio_rdac /dev/%n" failback immediate getuid_callout "/sbin/scsi_id -g -u /block/%n" } } and I'm still getting: sdh: checker msg is "directio checker reports path is down" create: 360022190009773680000214749504780 , [size=2.0T][features=0][hwhandler=0] \_ round-robin 0 [prio=1][undef] \_ #:#:#:# sdb 8:16 [undef][ready] \_ round-robin 0 [prio=0][undef] \_ #:#:#:# sdh 8:112 [undef][faulty] sdc: checker msg is "directio checker reports path is down" create: 3600221900096f27d00000ab3495047fd , [size=2.0T][features=0][hwhandler=0] \_ round-robin 0 [prio=0][undef] \_ #:#:#:# sdc 8:32 [undef][faulty] \_ round-robin 0 [prio=1][undef] \_ #:#:#:# sdi 8:128 [undef][ready] sdj: checker msg is "directio checker reports path is down" create: 360022190009773680000214a495047ce , [size=2.0T][features=0][hwhandler=0] \_ round-robin 0 [prio=1][undef] \_ #:#:#:# sdd 8:48 [undef][ready] \_ round-robin 0 [prio=0][undef] \_ #:#:#:# sdj 8:144 [undef][faulty] sde: checker msg is "directio checker reports path is down" create: 3600221900096f27d00000ab449504839 , [size=2.0T][features=0][hwhandler=0] \_ round-robin 0 [prio=0][undef] \_ #:#:#:# sde 8:64 [undef][faulty] \_ round-robin 0 [prio=1][undef] \_ #:#:#:# sdk 8:160 [undef][ready] sdl: checker msg is "directio checker reports path is down" create: 360022190009773680000214c49504806 , [size=1.1T][features=0][hwhandler=0] \_ round-robin 0 [prio=1][undef] \_ #:#:#:# sdf 8:80 [undef][ready] \_ round-robin 0 [prio=0][undef] \_ #:#:#:# sdl 8:176 [undef][faulty] create: 360022190009773680000000000000000 , [size=20M][features=0][hwhandler=0] \_ round-robin 0 [prio=1][undef] \_ #:#:#:# sdg 8:96 [undef][ready] create: 3600221900096f27d0000000000000000 , [size=20M][features=0][hwhandler=0] \_ round-robin 0 [prio=1][undef] \_ #:#:#:# sdm 8:192 [undef][ready] libdevmapper: libdm-common.c(312): Created /dev/mapper/360022190009773680000000000000000 libdevmapper: libdm-common.c(312): Created /dev/mapper/3600221900096f27d0000000000000000 Now this is not on RH or SLES, its an ubuntu 8.4 system. If absolutely necessary I would consider switching the distribution, but right now I'd prefer to stick with what all the other machines have. Thanks, Thomas -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel