mpathconf --enable
(abbr)
multipaths {
multipath {
wwid 360060e800589590000008959000000xx
alias mpath0
}
multipath {
wwid 360060e800589590000008959000000xx
alias mpath1
}
}
/var/lib/multipath/bindings #RHEL 4,5
mpath0 360060e80057094000000700000000xxx mpath1 360060e80057094000000700000000xxx
/etc/multipath/bindings #RHEL 6
mpathb 360060e80057094000000700000000xxx mpathc 360060e80057094000000700000000xxx
[root@test-server1 etc]# /etc/init.d/multipathd start
[root@test-server1 etc]# multipath -ll mpath0 (16465616462656166313a3100000000000000000000000000) dm-2 IET,VIRTUAL-DISK [size=4.0G][features=0][hwhandler=0] \_ round-robin 0 [prio=0][active] \_ 0:0:0:1 sda 8:0 [active][undef] \_ round-robin 0 [prio=0][enabled] \_ 1:0:0:1 sdb 8:16 [active][undef] [root@test-server1 etc]# ls -l /dev/mapper/mpath0 brw-rw---- 1 root disk 253, 2 Mar 28 21:27 /dev/mapper/mpath0
# fdisk /dev/mapper/mpath0 # kpartx -a /dev/mapper/mpath0 # ls /dev/mapper/ <- check /dev/mapper/mpath0p1 # mkfs -t ext3 /dev/mapper/mpath0p1
[root@host1 ~]# ls -l /dev/mapper crw------- 1 root root 10, 63 10月 29 12:43 control brw-rw---- 1 root disk 253, 0 10月 29 12:43 mpath0 brw-rw---- 1 root disk 253, 1 10月 29 12:43 mpath0p1 brw-rw---- 1 root disk 253, 2 10月 29 12:43 mpath0p2 [root@host1 mapper]#
# mkdir /mnt/test # mount /dev/mapper/mpath0p1 /mnt/test
# /etc/init.d/multipathd stop # multipath -F <- delete # multipath <- reacknowledge # /etc/init.d/multipathd start
-k multipathd will enter interactive mode. From this mode, the available commands can be viewed by entering “help”. When you are finished entering commands, press CTRL-D to quit.
# multipathd -k"show config"
# multipathd -k multipathd> help multipathd> show config multipathd> show blacklist multipathd> show device multipathd> CTRL-D
Ref: DM-Multipath Administration and Troubleshooting ubuntu 14.04