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SG0-001 · Question #217

A customer wants to present a LUN to a server totaling 5TB. The server will initially use only 100GB. The storage administrator will upgrade the SAN as more storage is needed. Which of the following i

The correct answer is A. LUN Masking. LUN Masking enables storage administrators to control which servers can access specific LUNs, providing critical flexibility in managing secure and segmented storage presentation within a SAN environment.

Storage Management

Question

A customer wants to present a LUN to a server totaling 5TB. The server will initially use only 100GB. The storage administrator will upgrade the SAN as more storage is needed. Which of the following is the BEST feature to use to present storage to the server while maximizing storage flexibility?

Options

  • ALUN Masking
  • BLUN Snapshot
  • CThin Provisioning
  • DThick Provisioning

How the community answered

(14 responses)
  • A
    71% (10)
  • B
    7% (1)
  • C
    7% (1)
  • D
    14% (2)

Why each option

LUN Masking enables storage administrators to control which servers can access specific LUNs, providing critical flexibility in managing secure and segmented storage presentation within a SAN environment.

ALUN MaskingCorrect

LUN Masking provides flexibility by allowing administrators to precisely define which LUNs are visible and accessible to specific servers, thus isolating storage and preventing unauthorized access or data corruption in multi-host SAN environments. This feature is fundamental for securely and flexibly "presenting storage" by managing LUN assignments.

BLUN Snapshot

LUN Snapshot creates point-in-time copies of a LUN for backup and recovery purposes, not for initial storage presentation or maximizing flexibility related to storage capacity growth.

CThin Provisioning

Thin Provisioning optimizes physical storage utilization by allocating space on demand rather than upfront, which enhances storage efficiency and defers physical upgrades, but it does not directly relate to the flexibility of controlling access to the LUN for a server.

DThick Provisioning

Thick Provisioning allocates all physical storage for a LUN upfront, which reduces flexibility by consuming physical capacity immediately, regardless of actual usage.

Concept tested: SAN LUN management and access control

Source: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/6_2/configuration/guide/fm_6_2_config/zoning_lun_masking.html

Topics

#Thin provisioning#LUN presentation#Capacity planning#Storage flexibility

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