Increase the maximum LUN per target

Increase the maximum LUN value for FC Adapter policy to 1024.


  1. In Cisco UCS Manager, select SAN > Policies > root > Fibre Channel Adapter Policies.
  2. Select the adapter policy of the ESXi hosts and select Options.
  3. Set the MAX LUN per Target to 1024.
    NOTE: Updating the MAX LUN may cause traffic disruption for all hosts, so update the MAX LUN before upgrading to ESXi 7.0.
  4. After upgrading to ESXi 7.0, log in to VMware vCenter using the HTML5 client.
  5. Select Host > Manage > Advanced System Settings > Edit.
  6. In Filter type, set the disk.maxLUN to 1024 for each host.