Sacar EMC powerpath ** lleva reboot del server**

Chequeo los valores actuales del multiapth y luego de los physical volume
# multipath -ll

Pseudo name=emcpowera
Symmetrix ID=000295700059
Logical device ID=1D4E
state=alive; policy=BasicFailover; queued-IOs=0
==============================================================================
--------------- Host ---------------   - Stor -  -- I/O Path --   -- Stats ---
###  HW Path               I/O Paths    Interf.  Mode     State   Q-IOs Errors
==============================================================================
   6 lpfc                   sdu         FA  6eB  unlic    alive      0      0
   4 lpfc                   sdk         FA 11eA  active   alive      0      0

Pseudo name=emcpowerb
Symmetrix ID=000295700059
Logical device ID=1D4D
state=alive; policy=BasicFailover; queued-IOs=0
==============================================================================
--------------- Host ---------------   - Stor -  -- I/O Path --   -- Stats ---
###  HW Path               I/O Paths    Interf.  Mode     State   Q-IOs Errors
==============================================================================
   6 lpfc                   sdt         FA  6eB  unlic    alive      0      0
   4 lpfc                   sdj         FA 11eA  active   alive      0      0

Pseudo name=emcpowerc
Symmetrix ID=000295700059
Logical device ID=1D4C
state=alive; policy=BasicFailover; queued-IOs=0
==============================================================================
--------------- Host ---------------   - Stor -  -- I/O Path --   -- Stats ---
###  HW Path               I/O Paths    Interf.  Mode     State   Q-IOs Errors
==============================================================================
   6 lpfc                   sds         FA  6eB  unlic    alive      0      0
   4 lpfc                   sdi         FA 11eA  active   alive      0      0

 FA  6eB  unlic    alive      0      0
   4 lpfc                   sdf         FA 11eA  active   alive      0      0

#

Chequeo los physical volume actuales

# pvs
  PV              VG           Fmt  Attr PSize   PFree
  /dev/emcpoweri1 vg_u01       lvm2 a--   60.00g      0
  /dev/sda2       vg_omidbsrv2 lvm2 a--  278.88g 224.07g
#

Ahora hago la magia

# /etc/init.d/PowerPath stop
Stopping PowerPath: Following LVM volume groups are in use:
      Volume Group: vg_u01 (/dev/emcpoweri1)

These open logical volume devices use LUNs from PowerPath managed devices,
Please reissue the command after closing these volumes.
 failed

# mv /etc/init.d/PowerPath   /root/PowerPath
# 
# reboot -f

Luego del Reboot hacer

# powermt display dev=all

ERROR: Cannot open PowerPath. Initialization error

# pvs
  Found duplicate PV BKQDRy80KHl3e8ZDuJM4rws21cgjTlU0: using /dev/sdc1 not /dev/sdq1
  PV         VG           Fmt  Attr PSize   PFree  
  /dev/sda2  vg_omidbsrv2 lvm2 a--  278.88g 224.07g
  /dev/sdc1  vg_u01       lvm2 a--   60.00g      0 

# rpm -qa |grep -i emc
EMCpower.LINUX-5.7.1.00.00-029.el6.x86_64
# rpm -e EMCpower.LINUX-5.7.1.00.00-029.el6.x86_64

# yum install device-mapper-multipath

# cd /
# cp ./usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf /etc/multipath.conf

# service multipathd start
Starting multipathd daemon: [  OK  ]
# multipath -ll

# chkconfig multipathd on
#