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NS0-158 · Question #105

Click the Exhibit button. Referring to the exhibit, how many paths to the LUN will the host see?

The correct answer is B. 16. In a typical NetApp SAN configuration, 16 paths to a LUN can be achieved with a 2-node cluster providing multiple target ports and a host equipped with multiple HBAs connected via redundant fabrics.

Network Configuration and Data Access

Question

Click the Exhibit button. Referring to the exhibit, how many paths to the LUN will the host see?

Exhibit

NS0-158 question #105 exhibit

Options

  • A32
  • B16
  • C8
  • D4

How the community answered

(57 responses)
  • A
    11% (6)
  • B
    81% (46)
  • C
    5% (3)
  • D
    4% (2)

Why each option

In a typical NetApp SAN configuration, 16 paths to a LUN can be achieved with a 2-node cluster providing multiple target ports and a host equipped with multiple HBAs connected via redundant fabrics.

A32

32 paths would typically require a larger number of storage ports, more HBAs, or a larger cluster than a common 2-node setup would provide for a single LUN.

B16Correct

In a typical NetApp SAN configuration involving a 2-node cluster, where each node presents multiple (e.g., 4) Fibre Channel or iSCSI target ports for a LUN, and a host is equipped with multiple (e.g., 2) HBAs, the total number of redundant paths established for multipathing software often sums up to 16. This involves each host HBA establishing connections to all available LUN-serving ports across both storage controllers, facilitated by redundant SAN fabrics.

C8

8 paths are common for smaller configurations or less robust redundancy, not representing the maximum paths from a well-equipped 2-node SAN setup.

D4

4 paths would indicate minimal redundancy, such as one HBA connecting to two storage ports or two HBAs to one storage controller with two ports, which is less than optimal for high availability.

Concept tested: NetApp SAN multipathing configuration

Source: https://docs.netapp.com/us-en/ontap-san-config/fc-config/task_configure_san_host_fc.html

Topics

#SAN#LUN paths#multipathing#iSCSI/FCP

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