Dear all,
I just had a case where, I setup dm-multipath with DS4300-turbo (Dual
controller) with failover.
However with CLVM, whenever I try to check VGs with vgscan it would take
more than 3 mins.
Then in the /var/log/messages, I would see paths being dropped resulting
not having any path to the storage, and after few retries within
themselves, the right VGs will be shown.
However, I am very worried with outputs;
Jun 16 06:52:20 aigwebmail kernel: device-mapper: dm-multipath: Failing
path 8:16.
Jun 16 06:52:20 aigwebmail multipathd: 8:16: tur checker reports path is
down
Jun 16 06:52:20 aigwebmail multipathd: checker failed path 8:16 in map
4300-0
Jun 16 06:52:20 aigwebmail multipathd: 4300-0: remaining active paths: 1
Jun 16 06:52:21 aigwebmail multipathd: 8:144: tur checker reports path
is down
Jun 16 06:52:21 aigwebmail multipathd: checker failed path 8:144 in map
4300-0
Jun 16 06:52:21 aigwebmail kernel: device-mapper: dm-multipath: Failing
path 8:144.
Jun 16 06:52:31 aigwebmail multipathd: 4300-0: remaining active paths: 0
Jun 16 06:52:31 aigwebmail multipathd: 8:16: tur checker reports path is up
Jun 16 06:52:31 aigwebmail multipathd: 8:16: reinstated
Jun 16 06:52:31 aigwebmail multipathd: 4300-0: remaining active paths: 1
Jun 16 06:52:31 aigwebmail multipathd: 8:144: tur checker reports path is up
Jun 16 06:52:31 aigwebmail multipathd: 8:144: reinstated
Jun 16 06:52:31 aigwebmail multipathd: 4300-0: remaining active paths: 2
Jun 16 06:52:42 aigwebmail multipathd: 8:160: tur checker reports path
is down
Jun 16 06:52:42 aigwebmail multipathd: checker failed path 8:160 in map
4300-1
Jun 16 06:52:42 aigwebmail kernel: device-mapper: dm-multipath: Failing
path 8:160.
Jun 16 06:52:52 aigwebmail multipathd: 4300-1: remaining active paths: 1
Jun 16 06:52:52 aigwebmail multipathd: 8:160: tur checker reports path is up
Jun 16 06:52:52 aigwebmail multipathd: 8:160: reinstated
Jun 16 06:52:52 aigwebmail multipathd: 4300-1: remaining active paths: 2
FYI,
multipath.conf
defaults {
multipath_tool "/sbin/multipath -v0"
udev_dir /dev
polling_interval 10
selector "round-robin 0"
path_grouping_policy failover
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
prio_callout "/bin/true"
path_checker tur
rr_wmin_io 100
failback immediate
user_friendly_names yes
}
....
devnode_blacklist {
wwid 26353900f02796769
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]*"
devnode "sda"
Regards,
David Joo
}
--
dm-devel@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/dm-devel
