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[dm-devel] configuration mismatches on multipath.conf



Hi,

I have been working on the multipath setup of our lab systems to make sure that the products are reliable for us to start deploying as our default. I have noticed one issue that I am a little confused about. I have two multipath{} sections which are identical apart from the WWID and aliases. One comes up and reports one active and one enabled channel and the other reports both channels being active. Is that normal?

multipath -ll
eux0000411-eul0001138-R10-1 (3600a0b800036fd910000026e477c6db9) dm-1 IBM,1726-4xx FAStT
[size=271G][features=1 queue_if_no_path][hwhandler=0]
\_ round-robin 0 [prio=0][active]
 \_ 0:0:0:10 sdb 8:16  [active][ready]
\_ round-robin 0 [prio=0][enabled]
 \_ 1:0:0:10 sdd 8:48  [active][ready]
eux0000411-eul0001138-R1-1 (3600a0b800036fddd00000286477549b6) dm-0 IBM,1726-4xx FAStT
[size=68G][features=1 queue_if_no_path][hwhandler=0]
\_ round-robin 0 [prio=0][enabled]
 \_ 0:0:0:1  sda 8:0   [active][ready]
\_ round-robin 0 [prio=0][enabled]
 \_ 1:0:0:1  sdc 8:32  [active][ready]


cat /etc/multipath.conf
defaults {
        udev_dir                /dev
        polling_interval        10
        path_grouping_policy    multibus
        getuid_callout          "/lib/udev/scsi_id -g -u -s /block/%n"
        prio_callout            /bin/true
        path_checker            tur
        selector                "round-robin 0"
        rr_min_io               100
        rr_weight               priorities
        failback                immediate
        no_path_retry           fail
        user_friendly_names     yes
}

devnode_blacklist {
        devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
        devnode "^hd[a-z][[0-9]*]"
        devnode "^cciss!c[0-9]d[0-9]*[p[0-9]*]"
}

multipaths {
        multipath {
                wwid                    3600a0b800036fd910000026e477c6db9
                alias                   eux0000411-eul0001138-R10-1
                path_grouping_policy    failover
                path_checker            tur
                path_selector           "round-robin 0"
                failback                manual
                rr_weight               priorities
                no_path_retry           5
                rr_min_io               100
        }
        multipath {
                wwid                    3600a0b800036fddd00000286477549b6
                alias                   eux0000411-eul0001138-R1-1
                path_grouping_policy    failover
                path_checker            tur
                path_selector           "round-robin 0"
                failback                manual
                rr_weight               priorities
                no_path_retry           5
                rr_min_io               100
        }
}

devices {
        device {
                vendor                  "IBM"
                product                 "1726-4xx  FAStT"
                path_grouping_policy    multibus
getuid_callout "/lib/udev/scsi_id -g -u -s /block/%n"
                path_checker            tur
                path_selector           "round-robin 0"
                hardware_handler        "0"
                failback                15
                rr_weight               priorities
                no_path_retry           queue
                rr_min_io               100
        }
}


I have done a complete reboot of the system to make sure that there was no problem, Ive flushed the configuration and it still comes up in the same fashion. Can anyone provide some advice on this problem?

Regards,

Jimmy


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