Thanks for the info on this, checking it out now. I've installed and started the service but don't see anything yet. Assuming I have to do some configuring. Problem is that the system thinks there is some confusion about device letters. Found duplicate PV TB3VUn1m3CBOj8dRnRjAbRuD3ZIyBp7t: using /dev/sde1 not /dev/sda1 Found duplicate PV uXjYfhj4NlvQphf1DIz28psAAkFmJRaM: using /dev/sdf1 not /dev/sdb1 Found duplicate PV 3mlyNROBtWp4a3LXQEKBiCwk3pJear7u: using /dev/sdg1 not /dev/sdc1 1 logical volume(s) in volume group "VolGroup01" now active 1 logical volume(s) in volume group "VolGroup04" now active 1 logical volume(s) in volume group "VolGroup03" now active 1 logical volume(s) in volume group "VolGroup02" now active Do I need to clean this up before I get into the multipath config? Mike > wait a minute... this is the procedure i use to turn on multipath (sorry > i had forgotten that i did more than just turn on the service). > > update /etc/multipath.conf > mkinitrd -f /boot/initrd-`uname -r` `uname -r` > > reboot > > modprobe dm-multipath > modprobe dm-round-robin > service multipathd start > > at that point you should be able to do 'multipath -ll' and see your > multipath setup. > > Here is an example from one of my boxes that has 3 luns through 4 paths > a piece: > > [root@phantasos ~]# multipath -ll > mpath2 (36006016003e115003ef0eb769632db11) > [size=191 GB][features="1 queue_if_no_path"][hwhandler="1 emc"] > \_ round-robin 0 [prio=2][active] > \_ 1:0:3:1 sdg 8:96 [active][ready] > \_ 2:0:3:1 sdm 8:192 [active][ready] > \_ round-robin 0 [enabled] > \_ 1:0:2:1 sde 8:64 [active][ready] > \_ 2:0:2:1 sdk 8:160 [active][ready] > > mpath1 (36006016003e11500eefae69dd756da11) > [size=532 GB][features="1 queue_if_no_path"][hwhandler="1 emc"] > \_ round-robin 0 [prio=2][active] > \_ 1:0:3:0 sdf 8:80 [active][ready] > \_ 2:0:3:0 sdl 8:176 [active][ready] > \_ round-robin 0 [enabled] > \_ 1:0:2:0 sdd 8:48 [active][ready] > \_ 2:0:2:0 sdj 8:144 [active][ready] > > mpath0 (360060160a9a01000a23b3bb43cfbda11) > [size=532 GB][features="1 queue_if_no_path"][hwhandler="1 emc"] > \_ round-robin 0 [prio=2][active] > \_ 1:0:1:0 sdc 8:32 [active][ready] > \_ 2:0:1:0 sdi 8:128 [active][ready] > \_ round-robin 0 [enabled] > \_ 1:0:0:0 sdb 8:16 [active][ready] > \_ 2:0:0:0 sdh 8:112 [active][ready] > > > the mpathX is the use_friendly_names part of multipathd.conf, else the > 3600* would be the name. > > -greg -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
