NTSTATUS 0xC000049A (STATUS_NOT_SUPPORTED_ON

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: A Direct Access volume does not support the requested semantics.

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STATUS_DEVICE_IN_MAINTENANCE	STATUS_FREE_SPACE_TOO_FRAGMENTED

STATUS_NOT_SUPPORTED_ON_DAX

The requested operation is incompatible with a DAX volume

Direct Access maps persistent storage into the application address space and bypasses the normal file-system block I/O path. Some operations that depend on page-cache, remapping, or ordinary buffered-I/O semantics are therefore unavailable on DAX volumes.

Verify that the volume is intentionally DAX-enabled and that the application is DAX-aware. The fix might be to use a supported operation, move the workload to a block-mode volume, or redesign the data path. Reformatting the volume merely to suppress the status can introduce data-loss risk.

What to inspect

Confirm the volume DAX property and persistent-memory configuration.
Identify the exact unsupported control code or file operation.
Test the workload on supported block-mode storage before migration.

References

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