In a virtual environment that includes a SAN and VMware ESXI 5.0 or later, which of these steps would you perform last (before re-scanning storage adapters) when removing a storage LUN?

In a virtual environment that includes a SAN and VMware ESXI 5.0 or later, which of these steps would you perform last (before re-scanning storage adapters) when removing a storage LUN?

• Verify that the LUN is no longer used for storing VMs, templates, HA heartbeats, etc.
• Detach LUN in VMware client
• Disconnect LUN in SAN interface
• Unmount datastore  [Partially Correct Please share your answers on commnet box]

EXPLANATION

Removing a LUN in ESXi/ESX 4.x is complex. Improvements are made in ESXi 5.0 and later to streamline the procedure to make it easier for Administrators to remove LUNs.
 

Unmounting a LUN checklist

Before unmounting a LUN, ensure that:

• If the LUN is being used as a VMFS datastore, all objects, (such as virtual machines, snapshots, and templates) stored on the VMFS datastore are unregistered or moved to another datastore.
  
  Note: All CD/DVD images located on the VMFS datastore must also be unregistered from the virtual machines.
   
• The datastore is not used for vSphere HA heartbeat.
• The datastore is not part of a datastore cluster.

  SOURCE

 https://kb.vmware.com/s/article/2004605