<div class="gmail_quote">On Thu, Feb 5, 2009 at 6:37 PM, Moger, Babu <<a href="mailto:Babu.Moger@lsi.com">Babu.Moger@lsi.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Like Bryn said, you cannot have both MPP and device mapper together. MPP will be the first one to load. So it will claim all the devices. I have modified your multipath.conf file. Please try this one below. <div class="Ih2E3d"> devices { device { vendor "DELL" product "MD3000i" </div><div class="Ih2E3d"> product_blacklist "Universal Xport" features "1 queue_if_no_path" path_grouping_policy group_by_prio </div> prio_callout "/sbin/mpath_prio_rdac /dev/%n" getuid_callout "/sbin/scsi_id -g -u -s /block/%n" <div class="Ih2E3d"> hardware_handler "1 rdac" path_checker rdac prio "rdac" failback immediate } } </div></blockquote><div>Hi Thank you for the information. I changed my multipath.conf to the following: cat /etc/multipath.conf defaults { udev_dir /dev user_friendly_names yes } blacklist { devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*" devnode "^hd[a-z]" devnode "^sda" devnode "^sda[0-9]" } devices { device { vendor "DELL" product "MD Virtual Disk" product_blacklist "Universal Xport" features "1 queue_if_no_path" path_grouping_policy group_by_prio prio_callout "/sbin/mpath_prio_rdac /dev/%n" getuid_callout "/sbin/scsi_id -g -u -s /block/%n" hardware_handler "1 rdac" path_checker rdac prio "rdac" failback immediate } } then did: # multipath -F # service multipathd restart Now I get: # multipath -ll mpathe (36002219000918b4c00005b6c497e6632) dm-4 DELL,MD Virtual Disk [size=5.5T][features=1 queue_if_no_path][hwhandler=1 rdac] \_ round-robin 0 [prio=6][active] \_ 9:0:0:1 sdi 8:128 [active][ready] mpathd (36002219000918b3300002e6e497e6315) dm-3 DELL,MD Virtual Disk [size=5.5T][features=1 queue_if_no_path][hwhandler=1 rdac] \_ round-robin 0 [prio=6][active] \_ 9:0:0:2 sdj 8:144 [active][ready] mpathc (36002219000918b4c00005b6f497e6695) dm-2 DELL,MD Virtual Disk [size=5.5T][features=1 queue_if_no_path][hwhandler=1 rdac] \_ round-robin 0 [prio=6][active] \_ 9:0:0:3 sdk 8:160 [active][ready] mpathb (36002219000918b3300002e71497e6378) dm-1 DELL,MD Virtual Disk [size=5.5T][features=1 queue_if_no_path][hwhandler=1 rdac] \_ round-robin 0 [prio=6][active] \_ 9:0:0:4 sdl 8:176 [active][ready] mpatha (36002219000918b4c00005b72497e66f3) dm-0 DELL,MD Virtual Disk [size=5.5T][features=1 queue_if_no_path][hwhandler=1 rdac] \_ round-robin 0 [prio=6][active] \_ 9:0:0:5 sdm 8:192 [active][ready] mpathl (36002219000918b3300002e6b497e62a6) dm-11 DELL,MD Virtual Disk [size=5.5T][features=1 queue_if_no_path][hwhandler=1 rdac] \_ round-robin 0 [prio=6][active] \_ 9:0:0:0 sdb 8:16 [active][ready] mpathk (36002219000922cdf000004a4497e53f5) dm-10 DELL,MD Virtual Disk [size=5.5T][features=1 queue_if_no_path][hwhandler=1 rdac] \_ round-robin 0 [prio=6][active] \_ 9:0:1:10 sdc 8:32 [active][ready] mpathj (36002219000918b2e000004b2497e581c) dm-9 DELL,MD Virtual Disk [size=5.5T][features=1 queue_if_no_path][hwhandler=1 rdac] \_ round-robin 0 [prio=6][active] \_ 9:0:1:11 sdd 8:48 [active][ready] mpathi (36002219000922cdf000004a7497e54dd) dm-8 DELL,MD Virtual Disk [size=5.5T][features=1 queue_if_no_path][hwhandler=1 rdac] \_ round-robin 0 [prio=6][active] \_ 9:0:1:12 sde 8:64 [active][ready] mpathh (36002219000918b2e000004b5497e587e) dm-7 DELL,MD Virtual Disk [size=5.5T][features=1 queue_if_no_path][hwhandler=1 rdac] \_ round-robin 0 [prio=6][active] \_ 9:0:1:13 sdf 8:80 [active][ready] mpathg (36002219000922cdf000004aa497e5532) dm-6 DELL,MD Virtual Disk [size=5.5T][features=1 queue_if_no_path][hwhandler=1 rdac] \_ round-robin 0 [prio=6][active] \_ 9:0:1:14 sdg 8:96 [active][ready] mpathf (36002219000918b2e000004b8497e58dc) dm-5 DELL,MD Virtual Disk [size=5.5T][features=1 queue_if_no_path][hwhandler=1 rdac] \_ round-robin 0 [prio=6][active] \_ 9:0:1:15 sdh 8:112 [active][ready] Thank you Christian </div></div>