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SG0-001 · Question #259

An application administrator seeks to improve the I/O performance of the server's SAN-attached storage. Which HBA parameter setting change can affect the performance?

The correct answer is A. Queue Depth. Adjusting the HBA's Queue Depth parameter can significantly improve I/O performance by allowing more concurrent I/O requests to be processed by the SAN-attached storage.

Storage Management

Question

An application administrator seeks to improve the I/O performance of the server's SAN-attached storage. Which HBA parameter setting change can affect the performance?

Options

  • AQueue Depth
  • BPCI Connection Type
  • CNL-Port Mode
  • DSCSI ID Mapping

How the community answered

(44 responses)
  • A
    82% (36)
  • B
    9% (4)
  • C
    7% (3)
  • D
    2% (1)

Why each option

Adjusting the HBA's Queue Depth parameter can significantly improve I/O performance by allowing more concurrent I/O requests to be processed by the SAN-attached storage.

AQueue DepthCorrect

Queue Depth is an HBA parameter that specifies the maximum number of outstanding I/O commands that the HBA can send to a storage device simultaneously. Increasing this value can improve performance by allowing the HBA to keep the storage device busy with more requests, thereby reducing idle time, minimizing latency, and increasing overall I/O throughput for applications.

BPCI Connection Type

PCI Connection Type refers to the physical interface standard (e.g., PCIe generation, lane width) and is a hardware characteristic, not a software-configurable parameter for performance tuning.

CNL-Port Mode
DSCSI ID Mapping

Concept tested: HBA Queue Depth for I/O performance

Source: https://learn.microsoft.com/en-us/troubleshoot/windows-server/performance/increase-queue-depth-disk-controller

Topics

#HBA performance#Queue Depth#I/O optimization#SAN performance tuning

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