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SG0-001 · Question #589

An administrator needs to assign LUN IDs for two new LUNs from the same storage array. The first LUN is being presented as LUN 0 to multiple hosts. The second LUN is being dedicated to a single server

The correct answer is B. 1. When assigning LUN IDs to new LUNs, each LUN presented to a host or host group must have a unique identifier to prevent conflicts and ensure proper storage access.

Storage Management

Question

An administrator needs to assign LUN IDs for two new LUNs from the same storage array. The first LUN is being presented as LUN 0 to multiple hosts. The second LUN is being dedicated to a single server which is also included in the group of hosts LUN 0 is presented to. Which of the following is the LOWEST LUN ID that can be assigned to the second LUN?

Options

  • A0
  • B1
  • C2
  • D16

How the community answered

(51 responses)
  • A
    6% (3)
  • B
    75% (38)
  • C
    4% (2)
  • D
    16% (8)

Why each option

When assigning LUN IDs to new LUNs, each LUN presented to a host or host group must have a unique identifier to prevent conflicts and ensure proper storage access.

A0

LUN ID 0 is already assigned to the first LUN and cannot be reused for a different LUN presented to the same host simultaneously.

B1Correct

LUN IDs must be unique for each LUN presented to a given host or host group to avoid conflicts and ensure proper identification by the operating system. Since LUN 0 is already in use by the first LUN for the hosts in question, the next available and lowest unique LUN ID is 1.

C2

While LUN ID 2 is a valid choice, it is not the lowest possible LUN ID available after LUN 0 has been assigned.

D16

LUN ID 16 is a valid identifier but is unnecessarily high and not the lowest available option in this scenario.

Concept tested: LUN ID uniqueness and assignment

Source: https://www.snia.org/education/what-is-storage/lun

Topics

#LUN ID#LUN masking#storage addressing#SAN concepts

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