An organization is redesigning its database architecture to maintain continuous uptime for a critical online transaction system. The system requires continuous availability even if an entire database server experiences a hardware controller or motherboard failure. The infrastructure team suggests installing a hardware RAID 10 array on a single database server, claiming this will meet the high availability requirement without needing additional server nodes. Which of the following best explains why this proposed solution fails to satisfy the requirement?
- RAID 10 provides storage disk fault tolerance on a single system, but it cannot prevent system downtime caused by a total server hardware failure.Answer
- BRAID 10 relies on parity calculations that create excessive write latency, preventing real-time database transaction processing during a failover event.
- CRAID arrays function primarily as an asynchronous backup mechanism, requiring manual disk image restoration following a host outage.
- DRAID 10 is classified as a detective security control intended for integrity verification rather than a high availability mechanism.
Answer
RAID 10 provides storage disk fault tolerance on a single system, but it cannot prevent system downtime caused by a total server hardware failure.
High availability requires removing single points of failure across all infrastructure components. While RAID 10 protects against the failure of individual hard drives or solid-state drives within a chassis, the server itself remains a single point of failure. If the server motherboard, power supply, or RAID controller fails, the database becomes completely unavailable. To achieve host-level resilience, the architecture must include multi-node redundancy, such as a high-availability database cluster.
Step-by-Step Solution
Key Concept
High Availability vs. Storage Redundancy
Estimated Time:1m 15s