Remove LUN from ESXi host correctly

Delete LUN from ESXi host 

Source : http://blogs.vmware.com/vsphere/2011/11/best-practice-how-to-correctly-remove-a-lun-from-an-esx-host.html

For ESXi 4.0

1. Unregister all objects from the datastore including VMs and Templates
2. Ensure that no 3rd party tools are accessing the datastore
3. Ensure that no vSphere features, such as Storage I/O Control, are using the device
4. Mask the LUN from the ESX host by creating new rules in the PSA (Pluggable Storage Architecture)
5. Physically unpresent the LUN from the ESX host using the appropriate array tools
6. Rescan the SAN
7. Clean up the rules created earlier to mask the LUN
8. Unclaim any paths left over after the LUN has been removed

For ESXi 5.0

1. Unregister all objects from the datastore including VMs and Templates
2. Ensure that no 3rd party tools are accessing the datastore
3. Ensure that no vSphere features, such as Storage I/O Control or Storage DRS, are using the device
4. Detach the device from the ESX host; this will also initiate an unmount operation
5. Physically unpresent the LUN from the ESX host using the appropriate array tools
6. Rescan the SAN