Hello.
More details are required:
what kind of connection between storage and ESXi hosts (HBA fibre channel, ISCSI, SAS)?
What is the way of direct connection or through a SAN Switch ?
Depending on your answer you should verify if the physical connection is active or not.
You can enter the storage and validate the connection of the ESXi host that does not see the LUN.
Enrique Espinel
Senior Technical Support on IBM, Lenovo, Veeam Backup and VMware vSphere.
VSP-SV, VTSP-SV, VTSP-HCI, VTSP
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