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NS0-157 · Question #57

An administrator enabled the iSCSI protocol on an SVM and created a LUN for a Windows 2012 server. When the administrator uses Windows Disk Management, the LUN cannot be found. Which two statements…

The correct answer is A. Create an igroup and add the iSCSI IQN and then map it to the LUN. B. Configure the iSCSI service on the Windows 2012 server. For an iSCSI LUN to appear in Windows Disk Management, both the ONTAP access control mapping (igroup with the host IQN) and the Windows iSCSI Initiator service must be correctly configured.

Performance, Troubleshooting, and Security

Question

An administrator enabled the iSCSI protocol on an SVM and created a LUN for a Windows 2012 server. When the administrator uses Windows Disk Management, the LUN cannot be found. Which two statements describe how to solve this problem? (Choose two.)

Options

  • ACreate an igroup and add the iSCSI IQN and then map it to the LUN.
  • BConfigure the iSCSI service on the Windows 2012 server.
  • CDisable the ALUA support for the igroup that is mapped to the LUN.
  • DCreate an igroup and add the WWPN and then map it to the LUN.

How the community answered

(23 responses)
  • A
    78% (18)
  • C
    9% (2)
  • D
    13% (3)

Why each option

For an iSCSI LUN to appear in Windows Disk Management, both the ONTAP access control mapping (igroup with the host IQN) and the Windows iSCSI Initiator service must be correctly configured.

ACreate an igroup and add the iSCSI IQN and then map it to the LUN.Correct

An igroup of type iSCSI must be created containing the Windows host's IQN and then mapped to the LUN - this is the ONTAP mechanism that grants a specific initiator permission to discover and access the LUN.

BConfigure the iSCSI service on the Windows 2012 server.Correct

The Microsoft iSCSI Initiator service on Windows Server 2012 must be started and configured with the SVM's iSCSI LIF IP as a target portal so the host can log in to the ONTAP target and discover the mapped LUN.

CDisable the ALUA support for the igroup that is mapped to the LUN.

ALUA (Asymmetric Logical Unit Access) should remain enabled for Windows iSCSI hosts; disabling it does not resolve a LUN visibility problem and can degrade multipath I/O behavior.

DCreate an igroup and add the WWPN and then map it to the LUN.

WWPNs (World Wide Port Names) identify Fibre Channel host bus adapter ports and are used only for FCP igroups - iSCSI igroups require IQNs, so adding a WWPN to an iSCSI igroup is technically invalid.

Concept tested: iSCSI igroup creation, IQN mapping, and host initiator setup

Source: https://docs.netapp.com/us-en/ontap/san-admin/create-initiators-task.html

Topics

#iSCSI#igroup#LUN mapping#Windows iSCSI initiator

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