5V0-22.23 Free Practice Test

When adding a disk to a host that was previously used in a decommissioned vSAN cluster the intended disk does not show among the available devices in disk management.
Which action should be taken prior to assigning the disk on disk management?

1. A. Format the existing partition
2. B. Create a 1GB metadata partition
3. C. Delete all device partitions
4. D. Create a VMFS partition

Correct Answer: C
When adding a disk to a host that was previously used in a decommissioned vSAN cluster, the disk may still have some vSAN metadata partitions that prevent it from being recognized by disk management. To resolve this issue, the disk partitions need to be deleted using either ESXCLI or partedUtil commands. This will erase all data on the disk and make it available for use in disk management. References: VMware vSAN Specialist v2 EXAM 5V0-22.23, page 21

An administrator is troubleshooting a vSAN performance issue. In the vSAN performance monitor there is a high latency on the vSAN cluster.
What is a possible cause of this?

1. A. The Virtual Machines are using PVSCSI controllers.
2. B. Erasure Coding is disabled in the storage policy.
3. C. There is congestion in one or more disk groups.
4. D. Jumbo frames are not enabled on the VMkernel adapters.

Correct Answer: C
A possible cause of high latency on the vSAN cluster is that there is congestion in one or more disk groups. Congestion is a measure of how busy the storage devices are in handling I/O requests. When congestion is high, it means that the storage devices are overloaded and cannot process the requests fast enough, resulting in increased latency and reduced throughput. Congestion can be caused by various factors, such as insufficient cache capacity, disk failures, network issues, or heavy workload. The other options are not likely to cause high latency on the vSAN cluster. The Virtual Machines can use PVSCSI controllers without affecting latency, as they are optimized for high performance. Erasure Coding is a space efficiency feature that does not impact latency significantly. Jumbo frames are not required for vSAN, and enabling them does not guarantee lower latency. References: vSAN Performance Monitor; [vSAN Congestion Explained]

The vSphere Client reports that the state of some components stored on the vSAN datastore are in the reconfiguring state.
Which situation causes components to enter this state?

1. A. A host in the cluster enters maintenance mode.
2. B. The cluster is recovering from a vSAN failure.
3. C. The applied storage policy is modified.
4. D. Additional storage capacity is added to the cluster.

Correct Answer: C
The reconfiguring state indicates that some components stored on the vSAN datastore are being moved or resized to meet a new storage policy requirement. This state can occur when the applied storage policy is modified, such as changing the number of failures to tolerate, stripe width, or object space reservation. The other situations will not cause components to enter this state. References: [VMware vSAN Specialist v2 EXAM 5V0-22.23], page 31

An existing vSAN OSA cluster has this specification: Four ESXi hosts with all flash configuration
Each with two disk groups
Each disk group with one cache device and four capacity devices There are five more device slots available per host
The CTO would like to provision new applications, and these will need more capacity and performance.
Which two methods should be used by the vSAN administrator to meet this goal with the least amount of impact? (Choose two.)

1. A. Replacing all capacity devices with a similar larger device
2. B. Replacing all cache devices with a larger device
3. C. Adding one more disk group per host with the same configuration
4. D. Adding faster cache devices
5. E. Adding an ESXi host with identical device configuration

Correct Answer: CE
Adding one more disk group per host with the same configuration and adding an ESXi host with identical device configuration are the two methods that the vSAN administrator should use to meet the goal of increasing capacity and performance with the least amount of impact. Adding one more disk group per host will increase the raw storage capacity by 20% and also improve the performance by distributing the I/O load across more cache devices and disk groups. Adding an ESXi host with identical device configuration will increase the raw storage capacity by 25% and also improve the performance by adding more compute and network resources to the cluster. Both methods can be done without disrupting any ongoing operations or requiring any data evacuation or resynchronization. The other options are incorrect for the following reasons:
✑ Replacing all capacity devices with a similar larger device is incorrect because it will not increase the performance and will have a significant impact on the cluster. Replacing the capacity devices requires deleting the disk groups, which will erase all data on them and trigger a resynchronization of the affected objects. This can be disruptive and time-consuming, and also introduce additional network and disk traffic.
✑ Replacing all cache devices with a larger device is incorrect because it will not increase the capacity and will have a significant impact on the cluster. Replacing the cache devices also requires deleting the disk groups, which will have the same drawbacks as replacing the capacity devices. Moreover, increasing the cache size may not improve the performance significantly, as vSAN OSA uses afixed cache ratio of 70% for write buffer and 30% for read cache, regardless of the cache device size.
✑ Adding faster cache devices is incorrect because it will not increase the capacity and will have a significant impact on the cluster. Adding faster cache devices also requires deleting the disk groups, which will have the same drawbacks as replacing the cache devices. Furthermore, adding faster cache devices may not improve the performance significantly, as vSAN OSA uses a fixed cache ratio of 70% for write buffer and 30% for read cache, regardless of the cache device speed. References:
✑ VMware vSAN Specialist v2 Exam Preparation Guide, page 10
✑ Expanding a vSAN Cluster

An administrator is deploying a new two-node vSAN cluster with a shared witness to a remote location.
Which requirement must be met?

1. A. The ESXi hosts must have SSDs or NVMe configured for Virtual Flash File System.
2. B. The ESXi host's controller cache and advanced features must be disabled.
3. C. The ESXi host's drives must be configured in RAID 1 to support Failures to Tolerate of 1.
4. D. The ESXi hosts must have a minimum of 64 GBs of memory.

Correct Answer: D
To deploy a new two-node vSAN cluster with a shared witness, the administrator must meet several requirements, one of which is that the ESXi hosts must have a minimum of 64 GBs of memory. This is because each host must have enough memory to run the VMs and also to support the vSAN metadata overhead. The other options are not requirements for a two-node vSAN cluster with a shared witness. The ESXi hosts do not need SSDs or NVMe for Virtual Flash File System, as they can use any supported storage devices for vSAN. The ESXi host??s controller cache and advanced features do not need to be disabled, as they can be used to improve performance and reliability. The ESXi host??s drives do not need to be configured in RAID 1, as vSAN uses its own software-defined RAID mechanism to provide Failures to Tolerate.
References: Shared Witness for 2-Node vSAN Deployments; Two-Node Cluster Requirements