2V0-15.25 · Question #69
An administrator configures a new VMware Cloud Foundation (VCF) instance in a remote site using a vSAN Express Storage Architecture (ESA) for the workload domain cluster. vSAN ESA is configured with…
The correct answer is B. The number of ESX hosts doesn't support rebuilds during an outage. In VMware Cloud Foundation 9.0, using vSAN Express Storage Architecture (ESA) with Auto- Policy Management, the system automatically selects the correct storage policy based on the cluster size and desired failure protection. When the administrator configures tolerance for a…
Question
An administrator configures a new VMware Cloud Foundation (VCF) instance in a remote site using a vSAN Express Storage Architecture (ESA) for the workload domain cluster. vSAN ESA is configured with Auto-Policy Management and is designed to tolerate a single failure. The cluster experiences a hardware failure and on investigation, the administrator discovers that the affected objects did not re-protect and remain in a "Reduced availability with no rebuild" state. How can the administrator explain why the vSAN objects did not rebuild as expected?
Options
- AThe storage devices are not certified for vSAN.
- BThe number of ESX hosts doesn't support rebuilds during an outage.
- CThe storage policy needs to be modified to support forced provisioning.
- DThe existing disk groups need to be expanded to support additional capacity.
How the community answered
(17 responses)- A6% (1)
- B76% (13)
- C12% (2)
- D6% (1)
Explanation
In VMware Cloud Foundation 9.0, using vSAN Express Storage Architecture (ESA) with Auto- Policy Management, the system automatically selects the correct storage policy based on the cluster size and desired failure protection. When the administrator configures tolerance for a single failure (FTT=1 using RAID-1 mirroring), vSAN ESA requires sufficient remaining hosts during a failure event to reprotect objects. A minimum of 3 ESA-capable hosts is required for RAID-1, and re-protection after a failure requires enough hosts with available capacity to place new replica components. In small ESA clusters (e.g., 3 or 4 nodes), if one host fails, the remaining hosts may not meet the placement rules for automatic rebuild to restore compliance. ESA enforces strict placement rules to maintain consistent performance and resilience; if vSAN determines that object layout compliance cannot be restored without violating these rules, it enters Reduced availability with no rebuild state.
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