Exam 5V0-22.23 topic 1 question 32 discussion

A is the correct answer. If a four-node vSAN cluster has one host in maintenance mode with Ensure Accessibility mode and another node fails, the impact on virtual machines (VMs) can be significant. Ensure Accessibility mode only migrates the essential components needed to keep VMs running, but it doesn't re-protect the data against failures. If a second node fails, the cluster might not have enough redundancy to tolerate the failure, leading to potential VM unavailability and data loss.

The question is "How will the cluster be affected?" Correct it's B

Answer A : once the first host is in maintenance, some objects are accessible but not protected, and others are fully protected (if they have no components on the host). Once another host fails, some objects will only lose their witness or one copy of the data, and the ones which where not protected anymore will lose their data until at least one host come back to business.

When an administrator selects the “Ensure Accessibility” maintenance mode option in a vSAN cluster, vSAN ensures that all accessible virtual machines on the host remain accessible 1. Therefore, in this scenario, the virtual machines running on the host that is down for firmware upgrade will remain accessible. However, the virtual machines running on the host that has lost network connectivity to the remaining hosts may become inaccessible until the network connectivity is restored 12.

A is correct: Typically, only partial data evacuation is required. However, the virtual machine might no longer be fully compliant to a VM storage policy during evacuation. That means, it might not have access to all its replicas. If a failure occurs while the host is in maintenance mode and the Failures to tolerate is set to 1, you might experience data loss in the cluster

Typically, only partial data evacuation is required. However, the virtual machine might no longer be fully compliant to a VM storage policy during evacuation. That means, it might not have access to all its replicas. If a failure occurs while the host is in maintenance mode and the Primary level of failures to tolerate is set to 1, you might experience data loss in the cluster Answer A https://docs.vmware.com/en/VMware-vSphere/6.7/com.vmware.vsphere.virtualsan.doc/GUID-521EA4BC-E411-47D4-899A-5E0264469866.html

A. VMs might experience data loss. The "Ensure Accessibility" option is designed to tolerate the loss of one host in maintenance mode, but when a second host loses network connectivity, it can disrupt the normal operation of the vSAN cluster. In the worst-case scenario, VMs may not be able to access their data, which could lead to data unavailability and potential data loss.

A - If a failure occurs while the host is in maintenance mode and the Primary level of failures to tolerate is set to 1, you might experience data loss in the cluster. https://docs.vmware.com/en/VMware-vSphere/6.7/com.vmware.vsphere.virtualsan.doc/GUID-521EA4BC-E411-47D4-899A-5E0264469866.html

A: Since only "Ensure Accessibility" has been selected VM objects are not rebuilt and could lose more object and get inaccesible, alos see: https://docs.vmware.com/en/VMware-vSphere/8.0/vsan-administration/GUID-521EA4BC-E411-47D4-899A-5E0264469866.html

B is correct as default policy would be RAID 1 mirror so with one host down that would leave 3 hosts then if one more host failed that would leave 2 of 4”3 objects available for each vm which is more than 50% of votes so VMs would then be on RAID 0 from one copy of data so still online and ok but with reduced redundancy