3V0-23.25 Exam Dumps - VMware VCAP-Storage Questions and Answers

Disabling the vSAN iSCSI Target Service stops the service that presents iSCSI targets and LUNs to initiators, but it does not automatically delete the targets or LUNs. The vSAN administration guidance states that if an administrator wants to remove vSAN iSCSI objects and reclaim capacity, the LUNs and targets must be deleted manually before or after disabling the service. Therefore, when the service is disabled, the existing targets and LUNs remain in the vSAN datastore but are no longer accessible to the clustered legacy application. This behavior prevents accidental deletion of application or quorum data simply because the service is turned off. The targets are not archived for a fixed retention period, and they are not automatically migrated to another namespace for retention. They are also not deleted automatically. Operationally, administrators should confirm that the legacy application no longer depends on the LUNs before disabling the service or should remove the iSCSI objects through the supported workflow when decommissioning is complete. Reference topics: vSAN iSCSI Target Service, Disable iSCSI Target Service, LUN and Target Lifecycle, vSAN Object Retention.

Four hosts are required to meet the 12 TB usable-capacity requirement after applying the protection policy, data reduction, reserves, and overhead. Each host contributes 8 TB raw capacity from two 4 TB NVMe devices. Three hosts provide 24 TB raw capacity, but once host rebuild reservation, 10% operational reserve, RAID-5 protection overhead, and 25% filesystem/object overhead are considered, the remaining effective usable capacity falls below the required 12 TB target. Four hosts provide 32 TB raw capacity. With vSAN ESA and FTT=1/RAID-5, vSAN uses erasure coding to improve capacity efficiency compared with mirroring. The vSAN sizing guidance states that RAID-5 with FTT=1 provides approximately 75% usable capacity before other reserves and overhead. Host Rebuild Reserve must also be planned so the cluster has enough free capacity to rebuild components after a host failure. After applying the expected 1.5 data reduction ratio and the required reserves, four hosts provide enough usable capacity while three hosts do not. Reference topics: vSAN ESA Capacity Sizing, RAID-5 Erasure Coding, Host Rebuild Reserve, Operations Reserve, vSAN Object Overhead.

The Live! vSphere Heavy Hitter VM dashboard is the correct place to identify which virtual machines are driving storage IOPS and disk throughput problems. In VCF Operations, heavy hitter dashboards are designed to isolate the consumers creating the highest demand on shared infrastructure resources. For storage troubleshooting, this dashboard identifies VMs producing significant I/O load, including IOPS and throughput. This is especially useful when a Fibre Channel datastore is reporting performance alerts because the datastore itself may show contention, but the root cause is often one or more high-demand VMs consuming disproportionate backend storage resources. The vSAN Health dashboard is not correct because the affected datastore is Fibre Channel, not vSAN. The vSphere Storage Inventory dashboard is useful for topology and inventory visibility, but it is not the best view for identifying the VM-level consumers causing IOPS and throughput pressure. The Storage Operations page is broader and less targeted than the Live heavy hitter view. Reference topics: VCF Operations Performance Dashboards, Storage Heavy Hitters, VM IOPS and Throughput Troubleshooting.

The workload domain should use Fibre Channel as principal storage because the existing five hosts already have resilient HBAs and are connected to a dedicated, highly resilient storage area network. The third-party block storage is also stated to have sufficient scale, capacity, and IOPS for the new workload requirements only, so it should be reused where it directly fits: the VI workload domain. VMware Cloud Foundation supports Fibre Channel as both principal and supplemental storage for VI workload domains. The management domain should use VMware vSAN as principal storage because the four new servers are being purchased for the management domain, and the existing block storage is not sized for management workloads. vSAN is a native VCF principal storage model for management domains and provides automated deployment, policy-based management, lifecycle integration, and integrated operations. iSCSI is not the right answer because the scenario describes Fibre Channel SAN connectivity and HBAs, not an iSCSI design. vSAN for the workload domain would also fail the reuse requirement because it would ignore the existing block storage investment. Reference topics: Principal Storage, Fibre Channel Storage Model, vSAN Storage Model, Management Domain Storage.

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 design requires four hardware corrections. First, RAID-6 with FTT=2 requires six fault domains or hosts because RAID-6 erasure coding must place data and parity components across enough independent hosts to tolerate two failures. Therefore, four hosts are insufficient and the host count must increase to at least six. Second, Storage Traffic Separation requires sufficient physical NICs to support separate storage and non-storage traffic paths. With two distributed switches and redundant uplinks, the design must increase to four 25 GbE NICs per host. Third, vSAN ESA requires at least 128 GB of host memory; the provided 96 GB is below the minimum. Fourth, NVMe devices attached to a SATA/SAS/NVMe Tri-mode controller are not supported for vSAN storage pools. The documentation states that vSAN supports SAS and SATA devices on Tri-mode controllers, but NVMe devices must be directly connected to PCIe or use a supported NVMe design. The CPU count does not need to increase because 24 cores satisfies the stated vSAN ESA minimum in the referenced design guidance. Reference topics: vSAN ESA Hardware Requirements, RAID-6 FTT=2, Storage Traffic Separation, NVMe Controller Support.

vSAN Stretched Clusters meet the availability-zone requirement by extending a single logical vSAN cluster across two availability zones and using a witness for quorum. This provides rapid recovery from a site or availability-zone failure because workloads remain protected by the stretched topology and vSAN site-failure tolerance. vSAN Storage Cluster addresses the need for scalable, high-performance storage that can grow independently as application capacity requirements increase. In VCF 9.0, a vSAN Storage Cluster is based on vSAN ESA and provides disaggregated storage to vSAN compute or HCI clusters. This design supports storage-dense NVMe-based nodes, high IOPS, low latency, independent capacity scaling, and centralized storage services. Encryption at rest and in transit are native vSAN capabilities that can be enabled on the vSAN-backed storage architecture. vSAN File Service is for file shares, and vSAN iSCSI Target Service is for presenting block LUNs to external initiators; neither is required by the stated application-storage design. vSAN Data Protection is valuable for snapshots and recovery points, but the core architecture requirements are best satisfied by stretched site resilience plus scalable vSAN storage clustering. Reference topics: vSAN Storage Cluster, vSAN Stretched Cluster, vSAN ESA, vSAN Encryption.

Full Clone from Volume Snapshot

4kn Support

Online Volume Expansion

Offline Volume Expansion

Static Persistent Volume

VMware Kubernetes Service persistent volumes use vSphere storage integrations such as CNS and pvCSI to provide Kubernetes storage services backed by vSphere datastores and storage policies. The supported persistent volume capabilities include Static Persistent Volume, which allows pre-existing storage to be consumed by Kubernetes workloads; Offline Volume Expansion and Online Volume Expansion, which allow persistent volumes to be resized depending on workload and filesystem state; Full Clone from Volume Snapshot, which enables a new volume to be created from an existing snapshot; and 4kn Support, which supports modern 4K native storage devices where the underlying stack supports them. Storage vMotion with attached Persistent Volumes is not supported because moving an attached Kubernetes persistent volume while it is in active use can break attachment and consistency assumptions. Storage DRS is also not a supported persistent volume capability in this VKS context. Flash Read Cache is not part of the supported VKS persistent-volume capability set. Reference topics: VMware Kubernetes Service Storage, CNS, pvCSI, Persistent Volume Capabilities, Volume Expansion, Volume Snapshot Clone.

The Repair Delay Timer expires, and vSAN starts automatic repair evaluation.

Once data resync completes, objects are marked as Compliant again.

vSAN verifies policy requirements and rebuilds missing components on available capacity devices.

When a host goes offline unexpectedly, vSAN treats the missing components as absent and waits for the configured repair delay timer before initiating rebuild operations. This prevents unnecessary resynchronization when a host or device returns quickly. In this scenario, the host is offline for more than an hour, so the repair delay timer expires and vSAN begins automatic repair evaluation. vSAN then checks the assigned storage policies, available capacity, and fault-domain placement requirements to determine whether missing components can be rebuilt safely on available capacity devices. If sufficient capacity and fault domains exist, vSAN creates replacement components and starts resynchronization. When the resync process finishes and the affected objects again satisfy their assigned policies, the objects are marked Compliant. The administrator does not need to manually run a resync task from vCenter, and the host does not need to be placed into maintenance mode for automatic repair. A full cluster rebalance is a separate capacity-balancing operation and is not required before object repair. Reference topics: vSAN Repair Delay Timer, Object Compliance, Resynchronization, ESA Object Repair.

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.