FCP LUNs not visible on the host!!!

Problem: You have mapped LUNs on a storage system to a host machine using FCP. Now the issue is that the LUNs are not being discovered on the host.

Solution:
See the checklist below:

• HBA has the correct driver corresponding to the OS being used
• FC connectivity between the host and the storage system
  
• Host and the storage system belong to same zone in the FC switch
  
• LUNs on the storage system are mapped to the correct igroup(corresponding to the host, where you are trying to discover the LUNs

After checking all the above, perform a rescan on the host.