nerdexam
CompTIA

SG0-001 · Question #489

The switches in one fabric, in a redundant FC environment, were recently moved. A subset of hosts lost all connectivity to their SAN-attached disk resources during the move. Which of the following sho

The correct answer is C. Verify all host paths to storage are active.. Before moving switches in one fabric of a redundant Fibre Channel environment, an administrator must confirm all host paths to storage via the other fabric are active to prevent connectivity loss.

Storage Management

Question

The switches in one fabric, in a redundant FC environment, were recently moved. A subset of hosts lost all connectivity to their SAN-attached disk resources during the move. Which of the following should the administrator have checked BEFORE starting the move?

Options

  • AQuiesce the mission-critical applications.
  • BEnsure the MPIO version is up-to-date.
  • CVerify all host paths to storage are active.
  • DEnable all switches in the redundant fabric.

How the community answered

(45 responses)
  • A
    7% (3)
  • B
    18% (8)
  • C
    71% (32)
  • D
    4% (2)

Why each option

Before moving switches in one fabric of a redundant Fibre Channel environment, an administrator must confirm all host paths to storage via the other fabric are active to prevent connectivity loss.

AQuiesce the mission-critical applications.

Quiescing applications might be part of a larger maintenance plan, but it does not directly verify the underlying SAN path redundancy necessary to prevent connectivity loss during a fabric component move.

BEnsure the MPIO version is up-to-date.

Ensuring the MPIO version is up-to-date is a general best practice for system health, but it doesn't directly confirm the active status and proper configuration of redundant paths, which is the immediate concern for maintaining connectivity.

CVerify all host paths to storage are active.Correct

In a redundant Fibre Channel setup, hosts utilize multiple paths (often via MPIO) across different fabrics to ensure high availability. Verifying that all paths through the remaining fabric are active and functional before moving components in the other fabric ensures continuous connectivity for hosts by allowing I/O to failover or continue seamlessly.

DEnable all switches in the redundant fabric.

Enabling all switches in the redundant fabric is a standard operational state and doesn't address the specific pre-check needed before taking a subset of switches offline or moving them in one fabric.

Concept tested: Fibre Channel SAN redundancy validation and MPIO

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

Topics

#FC SAN#redundancy#MPIO#SAN maintenance

Community Discussion

No community discussion yet for this question.

Full SG0-001 Practice