Can you please help me to create a check list before decommisstioning cluster and ESX server.So that a safe decommisstion will ouccer with out any impact on production luns or network
What type of storage are you using? FC, FCOE, iSCSI, NFS?
Then next step would be -
6. Remove WWN/WWPN from any initiator group and remove and LUN masking & Zoning on FC Switch.