What is the Quorum Disk used for in a cluster vault system?

The Quorum Disk plays a crucial role in maintaining the integrity and consistency of data in a cluster vault system. It serves as a voting mechanism that helps ensure that only one node can make decisions at any given time. By establishing a quorum, or a minimum number of votes, the system can prevent scenarios where two nodes might become active simultaneously, which could lead to data corruption or communication errors between the cluster members.

When a cluster experiences a split-brain scenario—where nodes lose communication with each other—it relies on the Quorum Disk to determine which node retains authority over the data. This process is essential for ensuring that all operations are performed on a consistent dataset and helps to avoid conflicts that could arise if multiple nodes were to operate independently.

In contrast, the other choices do not accurately represent the function of the Quorum Disk. The focus is specifically on maintaining data integrity and preventing issues arising from miscommunications within the cluster, rather than enhancing processing power, increasing storage capacity, or monitoring network traffic.