CompTIA Cloud+ Practice Test

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To ensure a hypervisor remains operational in case of an OS disk crash, what configuration should be employed?

Configure RAID 0
Enable a failover cluster
Configure RAID 1
Implement disk partitioning

The correct answer is: Configure RAID 1

Configuring RAID 1 is the optimal choice for ensuring a hypervisor remains operational in the event of an OS disk crash because it involves data mirroring. In a RAID 1 configuration, data is replicated across two or more disks simultaneously. This means that if one disk fails, the other disk(s) contain an exact copy of the data, allowing the system to continue operating without interruption or data loss. This redundancy is crucial for hypervisors that manage multiple virtual machines, as any downtime can impact all hosted workloads. Using RAID 0, on the other hand, does not provide redundancy; instead, it stripes data across multiple disks to improve performance. If one disk fails in a RAID 0 setup, all data is lost. Enabling a failover cluster is beneficial for high availability but focuses on maintaining system continuity through the use of multiple servers and may not directly address the reliability of the storage volumes themselves. Implementing disk partitioning organizes data within a single disk and does not provide redundancy or fault tolerance against disk failure. Therefore, while it has its uses, it does not address the scenario of ensuring the hypervisor stays operational in the face of an OS disk crash.