Which two conditions are most likely to cause the error described? (Choose two

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 an ESXi 5.x host, using the storage array SAN management software. The administrator looks at the Storage configuration for the ESXi host, and does not see the new LUN. Other LUNs from the same storage array are visible.

Which two conditions are most likely to cause the error described? (Choose two.)

A.
The administrator has not performed a Rescan All on the ESXi host.

B.
The multipathing policy has been set to Fixed for the LUN.

C.
Zoning on the Fibre Channel switches is not configured correctly.

D.
The LUN was not presented to the correct ESXi host.

7 Comments on “Which two conditions are most likely to cause the error described? (Choose two

  1. Bart says:

    C is definitely wrong… You don’t zone a LUN to an ESXi host… The ESXi host and a storage array are zoned together. A lun is masked on the storage array.

  2. billy says:

    C seems right to me as well.

    Zoning has the following effects:
    ■ Reduces the number of targets and LUNs presented to a host.
    ■ Controls and isolates paths in a fabric.
    ■ Can prevent non-ESXi systems from accessing a particular storage system, and from possibly destroying VMFS data.
    ■ Can be used to separate different environments, for example, a test from a production environment.

    1. Tony says:

      No, you PRESENT a LUN to a host AFTER the zoning is configured.

      Zoning is configured on the FC switch, LUNs are presented on the storage array. Zone is simply a collection of HBA WWN that can talk to each other.

  3. Magampa SB says:

    Hi Let us not forget the fact that Vmware is in question here, zoning would more appropriate if this was about SNIA or a SAN question.

  4. wintel04 says:

    C is wrong because of “Other LUNs from the same storage array are visible.”

    Zoning – Limits access to specific storage devices, increases security, and decreases traffic over the network. Some storage vendors allow only single-initiator zones. In that case, an HBA can be in multiple zones to only one target. Other vendors allow multiple-initiator zones. See your storage vendor’s documentation for zoning requirements. Use the SAN switch software to configure and manage zoning.

  5. Rich says:

    C is wrong only because they didn’t say the the LUN was on a FC SAN. It could be iSCSI. If it was on FC, then C could very well be correct.


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