=====Adding Luns=====

I have not tried this procedure I ussually recommend rebooting server

Adding a LUN
To add a new LUN to an existing PowerPath configuration:
  - Ordered List ItemScan the bus for the LUNs.
  - Ensure that the new LUN is created on the storage side and recognized by Linux.
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  On SLES 10 SP4 , SLES 11 SP2, SLES 11 SP3, RHEL 5.x, RHEL 6.x, OL 5.x and OL 6.x. 
  For example, if powermt display lists HBAs 8 and 9, initiate the scan by typing:
  echo “- - -“ > /sys/class/scsi_host/host8/scan
  echo “- - -“ > /sys/class/scsi_host/host9/scan
  For iSCSI software initiator, type:
  echo “- - -“ > /sys/class/scsi_host/host<controller>/scan
</file>

  - Run powermt config to configure the new LUN.
  - Run powermt display to confirm the addition of the new LUN.


or you can use 

   echo "1" > /sys/class/fc_host/host1/issue_lip

which requests a lip