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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