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FVE_E_NOT_ALLOWED_ON_CLUSTER
The failed prerequisite
FVE_E_NOT_ALLOWED_ON_CLUSTER / 0x803100AE marks a rejected BitLocker transition: the requested BitLocker operation is not supported while the volume participates in a failover cluster.
Thin provisioning reports virtual size separately from allocated backing space. Operations that write every free extent can consume the entire pool without adding user data.
Diagnostic map
| Layer | cluster or thin-storage coordination |
|---|---|
| Proof to collect | cluster membership, resource group, CSV status, owner node, maintenance mode and requested operation |
| Different condition | FVE_E_NOT_ALLOWED_ON_CSV_STACK, where coordinator placement rather than universal cluster prohibition is the issue |
| First safe change | use the documented cluster BitLocker workflow or remove the volume from clustered service only through an approved maintenance plan |
Cluster Shared Volumes and thin-provisioned storage add ownership and allocation semantics that a standalone disk does not have. BitLocker operations must respect the CSV coordinator and must not force thin backing storage to allocate every virtual extent.
A focused verification sequence
Recommended operational response
- Use the documented cluster BitLocker workflow or remove the volume from clustered service only through an approved maintenance plan.
Get-ClusterSharedVolume | Format-List *
manage-bde -statusState checks specific to FVE_E_NOT_ALLOWED_ON_CLUSTER
| Stage | How to interpret it |
|---|---|
| Before the call | Record the target identity and the pre-call cluster or thin-storage coordination state. The requested BitLocker operation is not supported while the volume participates in a failover cluster. |
| At failure | Preserve cluster membership, resource group, CSV status, owner node, maintenance mode and requested operation. |
Official references
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