Pass the VMware VCAP-Storage 3V0-23.25 Questions and answers with CertsForce

In vSAN Original Storage Architecture, a disk group consists of one flash cache device and one or more capacity devices. The cache device is a required component of the disk group, so a failed cache device cannot be replaced as an isolated drive while preserving the same disk group. The supported operational approach is to remove the affected disk group, physically replace the failed cache device, verify that ESX detects the new device, and then manually recreate the disk group using the replacement cache device and the appropriate capacity devices. The scenario states that vSAN has already completed resynchronization and that all objects are healthy and compliant, so removing the failed disk group no longer risks object noncompliance. Selecting Full Data Migration on a failed cache device is not the correct workflow because the cache failure affects the entire disk group. Simply inserting a replacement drive does not cause vSAN OSA to automatically rebuild the disk group. Reference topics: vSAN OSA Disk Groups, Replace a Cache Device, Remove Disk Group, Recreate Disk Group.

Seven hosts per availability zone is required for this design. In a vSAN ESA stretched cluster, data components are distributed across two data sites, while a witness site provides quorum. The first requirement is a secondary level of resilience of FTT=2 using RAID-6 erasure coding. RAID-6 requires enough fault domains to place data and parity components while tolerating two failures. The second requirement is more restrictive: vSAN must be able to regain its prescribed level of resilience after a sustained host outage. This means the site must have enough remaining placement capacity to rebuild components and return objects to policy compliance after a host is lost. A six-host site can satisfy the RAID-6 placement minimum, but it does not provide the additional host needed to rebuild cleanly after a sustained host outage. Therefore, the design requires seven hosts in each availability zone. This produces fourteen data hosts across the stretched cluster, plus the witness. Reference topics: vSAN ESA Stretched Cluster Design, Secondary Level of Resilience, RAID-6 Erasure Coding, Availability Zone Host Count.

Linked clone is the correct feature because the administrator needs to test a potentially destructive change without directly modifying the production VM. vSAN Data Protection uses native vSAN ESA snapshot technology to protect virtual machines through protection groups and scheduled snapshots. Beyond simple restore operations, vSAN Data Protection supports clone workflows that allow a VM to be created from a protected snapshot for development, validation, testing, or recovery use cases. A linked clone is especially appropriate because it can be created quickly from an existing snapshot while maintaining dependency on the base snapshot, avoiding the time and capacity impact of a full independent copy. Immutable snapshots protect recovery points from deletion or modification, but they do not themselves provide an isolated test VM. Multiple schedules only control snapshot timing. A protection group defines which VMs are protected. Replication is used for site-level protection and disaster recovery, not for rapidly testing a destructive change against a local production snapshot. Reference topics: vSAN Data Protection, Snapshot Service, Protection Groups, Linked Clone from Snapshot, VM Test and Recovery Workflows.

The device has already been claimed by vSAN, so it is now part of the vSAN ESA storage pool. It must be removed from vSAN through a controlled device-removal workflow before it can be repurposed for memory tiering. The correct method is to remove the device from vSAN using Full Data Migration. This evacuation mode migrates data from the device to other eligible devices or hosts so that objects remain protected and compliant where possible. After the device is safely removed from the vSAN storage pool, it can be configured for memory tiering. Physically removing or hot-removing the device is unsafe because vSAN may still have components on it. Booting without the device is also not a supported configuration workflow. Changing disk claiming behavior and rebooting does not safely remove existing components from the already claimed device. vSAN ESA uses a storage pool model, so claimed NVMe devices contribute capacity and performance; a device intended for another purpose must be explicitly evacuated and removed before reuse. Reference topics: vSAN ESA Storage Pools, Device Claiming, Remove Storage Pool Device, Full Data Migration, Memory Tiering.

The correct mapping comes from the VCF 9.0 Principal and Supplemental Storage model. vSAN ESA is supported as principal storage for the Management Domain default cluster, Management Domain additional clusters, and VI Workload Domains. A vSAN Storage Cluster is not supported for the Management Domain default cluster because the initial management cluster requires a standard principal storage model, but it is supported as principal storage for Management Domain additional clusters and VI Workload Domains. Fibre Channel is supported as both principal and supplemental storage across all three domain or cluster categories, allowing either initial cluster creation or later datastore expansion. NFS v4.1 is supplemental-only across these categories. NFS can be principal only when using NFS v3; NFS v4.1 is used as supplemental storage after the domain or cluster exists. These statuses align with VCF’s distinction between principal storage, which is used during workload domain or cluster creation, and supplemental storage, which is added after creation for workloads or data-at-rest use cases. Reference topics: Storage Models, Principal Storage, Supplemental Storage, vSAN ESA, Storage Cluster, Fibre Channel, NFS.

Deploy ESX at 9.x

Deploy vCenter 9.x

Create Storage and General dvS

Configure VMkernel Binding for the NVMe over TCP Adapter

Add Software NVMe over TCP Adapters

Import the workload domain to VCF

The correct sequence starts by preparing the vSphere environment that will later be imported into VMware Cloud Foundation. ESX 9.x must be deployed first on the six blade hosts because the hosts provide the compute foundation for the workload domain. After the hosts are available, vCenter 9.x is deployed to manage the cluster and provide the required vSphere inventory. The two distributed switches are then created: one for storage isolation and one for general host and workload traffic. Because the external array supports NVMe/TCP only and multipathing is required, VMkernel binding must be configured for the NVMe over TCP adapter before the software NVMe over TCP adapters are added. This ensures the NVMe/TCP storage paths are correctly associated with the intended storage network. After the software NVMe over TCP adapters are created and the hosts can access the external storage, the prepared workload domain can be imported into the existing VCF environment. Reference topics: NVMe over TCP Configuration, VMkernel Binding, Software NVMe/TCP Adapters, Existing vCenter Import, VCF Workload Domain Import.

VMware vSAN is the correct principal storage for both the Management Domain and the Workload Domain because it is integrated, policy-based, scalable, and managed directly through VCF and vSphere. The Management Domain requirement explicitly calls for a highly scalable integrated storage solution that does not require additional storage management software or hardware, which aligns with vSAN. The Workload Domain also requires a highly scalable, policy-based storage solution for critical application workloads, which again maps directly to vSAN storage policies and vSAN datastore services. The second workload tier requires file-based storage that can scale independently of the cluster for workloads with large data requirements. NFS v3 is supported as supplemental storage and is appropriate for adding file-based capacity without changing the principal vSAN datastore. iSCSI is supplemental only and does not meet the Management Domain principal storage requirement. NFS v4.1 is not the correct principal storage selection for the Management Domain. Reference topics: VCF Storage Models, Principal Storage, Supplemental Storage, vSAN Storage Model, NFS Storage Model.

The correct design is to use VMFS datastores on the existing Fibre Channel SAN as principal storage for each workload domain. VCF supports Fibre Channel storage as a principal storage model for workload domains, and FC-backed VMFS datastores integrate directly with vSphere storage operations, VCF Operations monitoring, datastore clusters, Storage DRS, and Storage Policy Based Management. Assigning multiple storage policies based on array and LUN performance tiers allows VM placement and operational control to reflect the service levels provided by the SAN. This aligns with large-scale VI best practices where block storage arrays provide resilient paths, LUN masking, zoning, multipathing, and consistent performance tiers. Option A fails because it limits FC use to the Management Domain and uses local disks for workload domains, which does not match the requirement to leverage enterprise FC SAN for workloads. Option C is invalid because an external FC SAN cannot be mounted as a vSAN datastore. Option D incorrectly routes workload storage through management-cluster vVols and does not match the requested VMFS-on-FC architecture. Reference topics: Fibre Channel Storage Model, VMFS Datastores, Principal Storage, SPBM, Datastore Clusters.

Both vSAN OSA and vSAN ESA require a trusted key provider before Data-at-Rest Encryption can be enabled. With a standard external KMS, the configuration process includes adding the KMS to vCenter and establishing trust with the KMS. vCenter then provisions encryption keys from the key provider. The vSAN encryption workflow uses a Key Encryption Key from the KMS to protect Data Encryption Keys used by ESX hosts. This requirement applies to vSAN encryption generally and is not limited to a specific vSAN architecture. OSA supports external KMS integration, so the option stating that OSA does not support external KMS integration is incorrect. Trusted Platform Modules are not mandatory prerequisites for either OSA or ESA. The vSphere key provider requirements state that TPM is not required for a standard key provider or for vSphere Native Key Provider, although Native Key Provider availability can optionally be restricted to hosts with TPMs. Therefore, the mandatory prerequisite is a trusted KMS identity for both OSA and ESA. Reference topics: vSAN Data-at-Rest Encryption, Standard Key Provider, KMS Trust, OSA and ESA Encryption Support, TPM Requirements.

ESA evaluates available capacity and fault domains to satisfy policy compliance.

vSAN detects the failure and marks affected objects as non-compliant.

Resync completes and objects transition to Compliant status.

New components are instantiated on eligible capacity devices, and resync begins.

A failed NVMe device in a vSAN ESA cluster is handled as a storage pool device failure. vSAN first detects the failure and marks affected objects as non-compliant when their assigned storage policy requirements are no longer satisfied. ESA then evaluates available capacity and fault domains to determine whether replacement components can be placed in a way that restores compliance. If sufficient placement resources exist, vSAN creates new components on eligible capacity devices and begins resynchronization. After the resync completes, the affected objects transition back to Compliant status. The Repair Delay Timer is primarily associated with absent components, such as a host or device that may return, and is not the required step for a permanent NVMe failure. The administrator does not have to manually trigger Repair Objects Immediately for the normal automatic repair process. A full cluster rebalance is separate from repair and is not performed before rebuilding missing or degraded components. Reference topics: vSAN ESA Storage Pool Device Failure, Object Compliance, Automatic Reprotection, Resynchronization.