This topic provides general guidelines for setting a FC HBA on your ESX/ESXi host.

During FC HBA setup, consider the following issues.

FC HBAs work correctly with the default configuration settings. Follow the configuration guidelines given by your storage array vendor.


You should not mix FC HBAs from different vendors in a single server. Having different models of the same HBA is supported, but a single LUN cannot be accessed through two different HBA types, only through the same type. Ensure that the firmware level on each HBA is the same.

With both active-active and active-passive storage arrays, you can set up your host to use different paths to different LUNs so that your adapters are being used evenly. See Path Management and Manual, or Static, Load Balancing.

Set the timeout value for detecting a failover. The default timeout is 10 seconds. To ensure optimal performance, do not change the default value.

For best results, use a dedicated SCSI adapter for any tape drives that you are connecting to an ESX/ESXi system. FC connected tape drives are not supported. Use the Consolidated Backup proxy, as discussed in the Virtual Machine Backup Guide.