Which two vSAN Health Check items are included for vSphere Update Manager integration? (Choose two.)

What is a benefit of using vSphere Distributed Switches in a vSAN network?

A single disk in a vSAN disk group suffers from an unrecoverable hardware failure. This causes vSAN to set the health status for all disks in the group to Permanent disk loss, indicating disk failure. Assuming all other disks have not suffered from a hardware failure, why would vSAN mark all disks in the group as failed?

In stretched clusters, what is a benefit of implementing a virtual witness rather than a physical witness?

A storage administrator discovers vSAN is rebalancing components across a cluster randomly and faces degraded performance on the applications. What should be done to avoid these issues?