--- MPATH-ALU-fix ---

When pvscan returns WARNING's like
    Found duplicate PV wMAKI2G2jn2VDker1GmjxbaRd3ZYSBV3: using /dev/sde not /dev/sdb
    Using duplicate PV /dev/sde which is last seen, replacing /dev/sdb
    Found duplicate PV wMAKI2G2jn2VDker1GmjxbaRd3ZYSBV3: using /dev/sdh not /dev/sde
    Using duplicate PV /dev/sdh which is last seen, replacing /dev/sde
    Found duplicate PV wMAKI2G2jn2VDker1GmjxbaRd3ZYSBV3: using /dev/sdh not /dev/sdl
    Using duplicate PV /dev/sdh without holders, ignoring /dev/sdl

1. Find UUID's for storage : /usr/sbin/blkid
2. vi /etc/lvm/lvm.conf
   in the devices { section
   Find preferred_names = mod the entry ...
   preferred_names = [ "^/dev/sd*/", "^/dev/mapper/cd*", "^/dev/[hs]d" ]
    
   Find filter = add an entry (afer finding how many /deb/mapper/cd* disks there are )
   filter = [ "a|/dev/sda.*|", "a|/dev/mapper/cdb.*|", "r|.*|" ]
filter = [ "a|/dev/sda.*|", "a|/dev/mapper/cdb.*|", "a|/dev/mapper/cdc.*|", "r|.*|" ]
3. CHECK IT: pvscan
    
   
4. vi /etc/multipath.conf
   mode this entry if not already ... devnode "^sda"
5. Reconfigure the running multipathd
   /sbin/multipathd -k'reconfigure'
6. CHECK IT: pvscan
    
   
7. If there are still errors ... vgchange --refresh <VolumeGroupName>
   Re-Check pvscan

Some useful multipathd commands multipathd -k
    multipathd> show paths
    multipathd> show devices
    multipathd> list maps
    multipathd> list topology
    multipathd> list multipaths status