CompTIA
SG0-001 · Question #378
SG0-001 Question #378: Real Exam Question with Answer & Explanation
The correct answer is C. A dual-port HBA to an array capable of active/active sessions.. True load balancing in a SAN requires a dual-port HBA to connect to a storage array that is capable of concurrently processing I/O through multiple active controllers or ports.
Storage Functionality
Question
Which of the following is true for load balancing?
Options
- ALoad balancing cannot be provided without an effective RAID configuration.
- BA dual-port HBA will always provide load balancing.
- CA dual-port HBA to an array capable of active/active sessions.
- DI/O sent from a host through two ports to an array will provide load balancing.
Explanation
True load balancing in a SAN requires a dual-port HBA to connect to a storage array that is capable of concurrently processing I/O through multiple active controllers or ports.
Common mistakes.
- A. RAID configurations protect data and improve performance for individual disks within an array, but they are not directly responsible for load balancing I/O paths from a host to the array.
- B. A dual-port HBA only provides multiple paths; load balancing also requires intelligence in the multipathing software and the storage array to distribute I/O across those paths.
- D. Simply sending I/O from a host through two ports to an array does not guarantee load balancing; multipathing software and an active-active array are necessary to intelligently distribute and process the I/O across those paths.
Concept tested. SAN I/O load balancing requirements
Topics
#SAN load balancing#Active/active array#HBA configuration
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