A request has been made to the SAN Administrator to provision a new LUN. A LUN (LUN 6) is created and the SAN administrator presents the LUN to the ESX Server using the storage array SAN Management software. After a Rescan operation on the ABC ESX Server, the LUN does not show up. Other LUNs from the same storage array are visible. Which of the following could be the cause (Choose Two)?

A.
Zoning is not set up correctly

B.
The HBA on the active path is shared with the service console

C.
The LUN was not presented to the correct ESX Server

D.
LUN masking on a range of LUNS is enabled on the ESX Server, causing LUN 6 to be ignored

Explanation:
Using Storage Area Networks with ESX Server.

Disk arrays carve the storage RAID set into logical units (LUNs) that are presented to the server in a manner similar to an independent single disk. Typically, LUNs are few in number, relatively large, and fixed in size. Therefore it is possible that the LUN was not presented to the correct ESX server, (C above).

For administrative or security purposes, you can use LUN masking to prevent the server from seeing LUNs that it doesn’t need to access. Therefore it is possible an incorrect mask has been set up, (D above).