hi all,
i've configured multipath on a linux box and i'm getting these messages on
syslog:
May 30 10:50:05 mail-1 udevd-work[25148]: rename(/dev/disk/by-
id/wwn-0x6006016052b022002e770b609680e011.udev-tmp, /dev/disk/by-
id/wwn-0x6006016052b022002e770b609680e011) failed: No such file or directory
and sometimes after a path failure, the different paths get different scsi
names, /proc/partitions shows in that case:
8 16 838860800 sdb
8 32 849582720 sdc
8 80 838860800 sdf
8 96 849582720 sdg
252 3 849582720 dm-3
252 4 838860800 dm-4
8 208 838860800 sdn
8 224 849582720 sdo
65 0 849582720 sdq
8 240 838860800 sdp
and then multipath gets crazy:
May 25 12:26:51 mail-1 multipathd: sdh: emc_clariion_checker: sending query
command failed
...
i guess i should tell udev to asign persistant names using uuid? what's the
right way to address this problem?
this is my config:
root@mail-1:~# multipath -ll
backup (36006016052b022009cd7f2aeaf80e011) dm-3 DGC ,RAID 5
[size=810G][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=2][active]
\_ 3:0:1:1 sdg 8:96 [active][ready]
\_ 4:0:0:1 sde 8:64 [active][ready]
\_ round-robin 0 [prio=0][enabled]
\_ 3:0:0:1 sdc 8:32 [active][ready]
\_ 4:0:1:1 sdi 8:128 [active][ready]
mail (36006016052b022002e770b609680e011) dm-4 DGC ,RAID 5
[size=800G][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=2][active]
\_ 4:0:0:0 sdd 8:48 [active][ready]
\_ 3:0:1:0 sdf 8:80 [active][ready]
\_ round-robin 0 [prio=0][enabled]
\_ 3:0:0:0 sdb 8:16 [active][ready]
\_ 4:0:1:0 sdh 8:112 [active][ready]
root@mail-1:~# cat /etc/multipath.conf
#
blacklist {
devnode "sda"
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]*]"
}
defaults {
user_friendly_names no
}
devices {
device {
vendor "DGC"
product "*"
path_grouping_policy group_by_prio
getuid_callout "/lib/udev/scsi_id -g -u -d /dev/%n"
prio_callout "/sbin/mpath_prio_emc /dev/%n"
hardware_handler "1 emc"
no_path_retry 300
path_checker emc_clariion
failback immediate
}
}
multipaths {
multipath {
wwid 36006016052b022002e770b609680e011
alias mail
}
multipath {
wwid 36006016052b022009cd7f2aeaf80e011
alias backup
}
}
thanks in advance!
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