--- MPATH-ALU-fix ---

Gen the lines to add to /etc/multipath.conf

multipath -l |egrep mpath |cut -d\( -f2 |cut -d\) -f1 |awk '{print "        wwid \""$1"\""}'

Add the lines generated above into the blacklist section at the top of the file.

vi /etc/multipath

blacklist {
        devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
        ### Allow the /dev/sd being used `(/dev/sdd)
        devnode "^hd[a-z]"
        devnode "^sd[a-c]"
        devnode "^sd[e-z]"
        wwid "36000d3100572ee0100000000000000??"
        wwid "36000d3100572ee0100000000000000??"
}

Check the /dev/mapper directory

ls -l /dev/mapper
 

The restart can be done with out stopping the existing connections using multipath -k

multipathd -k
    multipathd> show paths      ### the ALU's that are in error will be displayed
    multipathd> reconfigure     ### this will read the config file
    multipathd> show paths      ### the ALU's should now be gone
    multipathd> quit
 

Check the /dev/mapper directory

ls -l /dev/mapper