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[dm-devel] multipath device won't assemble



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hi list. I'm working with fastt storage and experience some problems with multipath-tools. as you
can see bellow, multapath can't create mpath0, but mpath1 successful created. I can't understand
why. googling around two days without any result. help me, please;(

alexander
info-------------------------------------------------------------------------------------------------
OS: CentOS 4.92
kernel: 2.6.18-1.2747.el5xen
multipath.conf (default):
defaults {
        user_friendly_names yes
}
defaults {
        udev_dir                /dev
        polling_interval        10
        selector                "round-robin 0"
        path_grouping_policy    multibus
        getuid_callout          "/sbin/scsi_id -g -u -s /block/%n"
        prio_callout            /bin/true
        path_checker            readsector0
        rr_min_io               1000
        rr_weight               priorities
        failback                immediate
        no_path_retry           fail
        user_friendly_name      yes
}

multipath -v3 output:
mpath0: pgfailback = -2 (config file default)
mpath0: pgpolicy = multibus (config file default)
mpath0: selector = round-robin 0 (internal default)
mpath0: features = 0 (internal default)
mpath0: hwhandler = 0 (internal default)
mpath0: rr_weight = 2 (config file default)
mpath0: minio = 1000 (config file default)
mpath0: no_path_retry = -1 (config file default)
pg_timeout = NONE (internal default)
mpath0: set ACT_CREATE (map does not exist)
mpath0: domap (0) failure for create/reload map

dmesg output:
device-mapper: table: 253:5: multipath: error getting device
device-mapper: ioctl: error adding target to table
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