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(FC) LUNs not visible on the Linux host

FC LUNs appear as local disks to the host. If the storage system LUNs are not available as disks on the hosts, try rescanning the HBAs by reloading the drivers. If the LUNs still do not appear, verify the configuration settings.

Configuration settings What you should do
Driver version Verify that the version of the external HBA driver you are running is supported. You can check the up-to-date system requirements in the NetApp Interoperability Matrix.
Cabling Verify that the cables between the host and the storage system are properly connected.
Zoning Verify that the zoning is correct.
HBA Setting Verify the recommended HBA settings.
FC service status Verify that the FC service is licensed and started on the storage system. For more information, see the Data ONTAP SAN Administration Guide for 7-Mode.
HBA World Wide Port Names

Verify that you are using the correct initiator WWPNs in the igroup configuration.

On the storage system, use the igroup show command to display the WWPNs of the initiators in the storage system’s igroups. On the host, use the HBA tools to display the initiator WWPN. The initiator WWPNs configured in the igroup and on the host should match.

Initiator login

Verify that the initiator is logged in to the storage system by entering the fcp show initiator command on the storage system console.

If the initiator is configured and logged in to the storage system, the storage system console displays the initiator WWPN.

LUN mappings

Verify that the LUNs are mapped to an igroup.

On the storage system, use one of the following commands:
  • lun show -m displays all the LUNs and the igroups to which they are mapped.
  • lun show -g igroup-name displays the LUNs mapped to a specific igroup.
System requirements Verify that the components of your configuration are supported. Verify that you have the correct host Operating System (OS) Service Pack level, initiator version, Data ONTAP version, and other system requirements. You can check the up-to-date system requirements in the NetApp Interoperability Matrix.