yum install device-mapper-multipath
/dev/mapper/mpathN
mpathconf --enable --user_friendly_names y
blacklist { devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*" }
defaults { ... find_multipaths yes ... }
rescan-scsi-bus.sh
cd /dev/disk/by-id/ ls -lthr
grep scsi-xxxxxxxxxxxxxxxxxxx-part1
multipaths { multipath { wwid 36000d310042cbc000000000000000004 alias DATA_01 features "1 queue_if_no_path" } } defaults { no_path_retry fail }
DATA_01 should be ASM name
multipath -ll
mpatha (36000d310042cbc000000000000000004) dm-2 COMPELNT,Compellent Vol size=500G features='1 queue_if_no_path' hwhandler='0' wp=rw `-+- policy='service-time 0' prio=1 status=active |- 7:0:0:1 sdb 8:16 active ready running |- 7:0:2:1 sdc 8:32 active ready running |- 16:0:0:1 sdd 8:48 active ready running `- 16:0:2:1 sde 8:64 active ready running