3V0-23.25 Exam Dumps : Advanced VMware Cloud Foundation 9.0 Storage

vSAN object availability is based on two conditions: an intact replica must be available, and more than 50% of the object’s votes must be accessible. In this scenario, vSAN can locate a full replica and 55% of the votes for the noncompliant objects. Because 55% is greater than the quorum threshold, the objects remain available to the vSAN datastore. A noncompliant status means the VM objects do not currently satisfy the assigned storage policy, but it does not automatically mean the VM is inaccessible. The documentation states that if the operational state remains healthy although the object is noncompliant, the virtual machine can continue using the vSAN datastore. If the cluster contains enough resources and the failure is permanent, vSAN automatically recovers failed components and restores compliance. The VM is marked inaccessible only when a full replica cannot be located or when 50% or fewer votes are available. It becomes orphaned only if the VM namespace, such as the .vmx file, cannot be accessed. Reference topics: vSAN Object Health, Quorum Votes, Noncompliant Objects, Inaccessible and Orphaned VM States.

In vSAN ESA, the observed three disk stripes are expected behavior for objects using RAID-1, even when the storage policy shows “Number of disk stripes per object = 1.” The vSAN policy rule defines the minimum number of capacity devices across which each replica of an object is striped, and the default value is 1. However, VMware documentation explicitly notes that objects in a vSAN ESA cluster with RAID-0 or RAID-1 configuration have 3 disk stripes, even if the default storage policy defines only 1 disk stripe. Therefore, the three stripes are not caused by site mirroring itself, nor by the VM having three objects. Site mirroring controls placement across the preferred and secondary sites in a stretched cluster, while Failures to tolerate with RAID-1 controls local host/device protection. The behavior is also not evidence that a VM-level policy override exists. The datastore-level policy can still be applied correctly; ESA’s internal RAID-1 object layout uses three stripes as part of its optimized storage architecture. Reference topics: vSAN ESA Default Storage Policy Characteristics, Number of Disk Stripes per Object, RAID-1 Mirroring, vSAN Stretched Cluster Storage Policies.

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.