SG0-001 · Question #587
A server has dual power supplies, dual mirrored hard drives, multi-pathed multiple NICs, and a dual port HBA for access into a SAN. Which of the following components is a single point of failure?
The correct answer is B. HBA. The question asks to identify a single point of failure (SPOF) in a server with several redundant components. A dual port Host Bus Adapter (HBA) on its own represents a single physical component.
Question
A server has dual power supplies, dual mirrored hard drives, multi-pathed multiple NICs, and a dual port HBA for access into a SAN. Which of the following components is a single point of failure?
Options
- APower supplies
- BHBA
- CNICs
- DSystem hard drives
How the community answered
(46 responses)- A4% (2)
- B70% (32)
- C20% (9)
- D7% (3)
Why each option
The question asks to identify a single point of failure (SPOF) in a server with several redundant components. A dual port Host Bus Adapter (HBA) on its own represents a single physical component.
The server has dual power supplies, providing redundancy, so one power supply failing would not cause server downtime.
A dual port HBA is still a single physical component; if the entire HBA card fails, SAN access will be lost, making it a single point of failure despite having multiple ports. True redundancy for SAN connectivity typically requires two separate HBAs.
The server has 'multi-pathed multiple NICs,' indicating network redundancy where multiple network interface cards are configured for failover.
The server has 'dual mirrored hard drives,' implying a RAID 1 configuration, where data is redundant across two drives, preventing a single drive failure from causing data loss.
Concept tested: Single point of failure, redundancy
Topics
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