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SG0-001 · Question #83

An administrator installs a second HBA into a server for redundancy. Now the server is reporting that there are two storage devices available whereas before there was only one. Which of the following

The correct answer is B. Install and configure multipath software.. When a second HBA is installed for redundancy and the server reports duplicate storage devices, the administrator must install and configure multipath software.

Storage Implementation

Question

An administrator installs a second HBA into a server for redundancy. Now the server is reporting that there are two storage devices available whereas before there was only one. Which of the following additional steps should the administrator take?

Options

  • AInstall a new HBA that is the same model as the old HBA
  • BInstall and configure multipath software.
  • CMask the second LUN to hide it from view.
  • DMove the HBA connection to a redundant switch.

How the community answered

(26 responses)
  • A
    8% (2)
  • B
    73% (19)
  • C
    4% (1)
  • D
    15% (4)

Why each option

When a second HBA is installed for redundancy and the server reports duplicate storage devices, the administrator must install and configure multipath software.

AInstall a new HBA that is the same model as the old HBA

Installing a new HBA of the same model will not resolve the issue of the server seeing multiple paths as separate devices; path management software is needed.

BInstall and configure multipath software.Correct

Multipath I/O (MPIO) software is essential when a server has multiple Host Bus Adapters (HBAs) providing redundant paths to the same storage LUN. MPIO aggregates these multiple physical paths into a single logical device, preventing the operating system from seeing duplicate devices and enabling features like load balancing and automatic failover for high availability.

CMask the second LUN to hide it from view.

LUN masking is performed on the storage array to control which hosts can access specific LUNs, not to manage multiple paths to an already accessible LUN from the host side.

DMove the HBA connection to a redundant switch.

While connecting to a redundant switch enhances fabric redundancy, it does not address the host-side problem of managing multiple paths to the same LUN; MPIO is required for that.

Concept tested: Multipath I/O (MPIO) for storage redundancy

Source: https://learn.microsoft.com/en-us/windows-server/storage/multipath-io/overview

Topics

#multipathing#HBA configuration#storage redundancy#SAN implementation

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